Welcome to the The Weekly Ride by Cycling Fusion:
Originally posted 2018-03-13 15:36:45.
Welcome to the The Weekly Ride by Cycling Fusion
Originally posted 2018-12-23 09:34:42.
By Team ICG® Master Trainer Joan Kent
It’s possible, even likely, that you have cycling class members with hypertension. It’s possible that they’ve been told by their doctors to cut back on salt in their diets. If not, it’s still possible that they’re cutting back on salt because that’s the prevailing wisdom for controlling blood pressure.
As we all know, sodium is loss in sweat. The more we sweat, the more we lose. Long and/or intense trainings or hot environments result in greater sweat production and greater sodium loss. Symptoms of low sodium can include disorientation, nausea, fatigue, even seizures or collapse. Even in a controlled indoor environment, warm outdoor temperatures can increase sweating.
As important as sodium levels are, it’s obviously not a good idea for our students to cut back on salt intake without letting the prescribing M.D. know that they take cycling classes and often sweat profusely in them. In warmer weather, this becomes even more important.
But this post isn’t just about salt. High-carb diets may raise blood pressure because of the increased insulin they trigger. There are several mechanisms by which high levels of insulin can raise blood pressure.
High insulin levels increase sympathetic nervous system activity, leading to vasoconstriction. That increases both heart rate and blood pressure.
Insulin also stimulates the proliferation/multiplication of the smooth muscle cells lining the arteries. That may narrow the size of the arterial opening (lumen) and increase blood pressure, sort of in the same way that a narrower hose can increase water pressure.
Insulin promotes the production of serotonin, a brain chemical that’s also a vasoconstrictor. Vasoconstriction can raise blood pressure. The relationship between insulin levels and serotonin production is pretty much linear, so the more insulin secreted — say, in response to a high-carb diet — the more serotonin is produced. The more serotonin, the more vasoconstriction, and so on.
As mentioned in a previous post, high insulin levels can increase production of series 2 prostaglandins, which are hormones that control cellular functions. Among their numerous negative health consequences, Series 2 prostaglandins cause inflammation and increase blood pressure.
So what should we recommend for our cycling students?
First, it’s always a good idea to stay away from simple (or as I like to call them, junky) carbs and limit alcohol. That can help to keep insulin levels from skyrocketing.
Second, avoiding all-carb meals/snacks is another good idea. Meals and snacks that include protein and healthful, unsaturated fats have less impact on insulin levels.
Third, avoid processed (also junky) foods that are loaded with sodium that we consumers can’t control.
Fourth, modify — but don’t eliminate — salt. We need it to replace what we lose in a cycling class. The upper limit is 2300 mg, or 1500 mg for older or hypertension-prone individuals. But for someone who sweats profusely, it might be possible to exceed those limits safely to a degree. It’s also possible to go too low, and one way of gauging that is by urine production. If you feel you can’t hold 50% of your water intake, that’s a sign that you could need more salt.
As some of you may be aware, there’s a long-standing table salt/sea salt debate raging. Some sources maintain that the natural minerals in sea salt reduce the overall sodium content. Or that the larger size of sea salt crystals reduces the amount of salt in a teaspoon. Or that the more intense flavor of some sea salts encourages reduced consumption. These factors are said to make sea salt more healthful, but arguments appear to be inconclusive. One suggestion for sea salt users might be to take a kelp tablet daily to compensate for the absence of iodine that’s typically added to table salt. Or to buy sea salt with added iodine. Iodine’s necessary to prevent goiter.
Rather than join the Great Salt Debate, my point in this post is to encourage moderate consumption of salt among our cycling participants concerned with sodium and hypertension, primarily to avoid the negative consequences of low sodium.
Even more importantly, I’d encourage smart consumption of the best carbs to avoid the various mechanisms — related to insulin secretion — that can and DO cause hypertension, even with a low-sodium diet.
Originally posted 2013-07-01 08:22:47.
We talk a lot about becoming more than just instructors in our indoor cycling classes. We want to be coaches. We are coaches! I’ve spent the last 20 years coaching riders and teams on the road and half that indoors. Anyone who has taken one of my classes knows that “coaching” is my approach to indoor cycling. I introduce each of my classes as “coached training sessions” so riders know what to expect, plus it gives me the self-proclaimed freedom to get into character (like they really have a choice). Since many of you share this passion with me, over the next few months I going to post a series of articles on various suggestions and tips to bring that coaching character in you to the forefront.
My Black Book
Because of my coaching background, when I first started teaching indoor cycling I felt the deep desire to help people beyond the walls of the studio. Almost without exception, everyone in my class had some kind of goal or reason for being there. It could be as simple as increasing their fitness level, loosing weight, preparing for an upcoming charity ride, cycling vacation or competitive event. I thought “if I knew what their specific goals were, I could do a better job connecting with them and helping them”. Thus, I created the Black Book.
It was just a thin 3-ring binder (black of course) that contained forms — one for each rider. You can download a sample of this form from Cycling Fusion at www.cyclingfusion.com/downloads/CyclingFusion-BlackBook.pdf. I would make an announcement at the end of each class letting riders know that they could fill out a page in the Black Book if they wanted further help from me in obtaining their training and riding goals. I got a couple of takers at first and then it snowballed.
Individual Attention
Before each class I would review the goals of those in my class. I asked each person in the Black Book to show up 15-minutes early to class which is when I would give them specific guidance on how to approach the class that day. For example: “Mary, tomorrow you are planning on riding outdoors with your club so go a little easier on that last hill today. We want the legs fresh in the morning”. It was just some simple guidance to each rider about how to approach the day’s class.
The Benefits
Besides allowing me to satisfy my goal of helping riders outside of the studio, I started to connect with them more which increased the popularity and energy of my class. Other riders saw the attention my Black Book riders were getting and wanted in on the action. If you are trying to make a living as a cycling coach, I believe a Black Book is a must. Riders will always want more, and since you have already been so helpful, taking the next step into a formal coaching relationship ($$$) is easy. A side benefit for me was it helped me better remember riders names. I’ll take all the help I can get.
Originally posted 2011-08-12 14:57:47.
NOTE: this was a previous review from 2013 that continues to remain accurate when applied to any of the magnetic friction Indoor Cycles available today.
Many Indoor Cycle manufacturers claim a connection with cycling outdoors:
100% Authentic – Spinning is authentic. It’s true to its cycling roots, yet refined to a simplicity that makes it the perfect program for any age or ability.
FreeMotion says; Drive System Mimics Outdoor Riding
The Schwinn® Authentic Cyclingâ„¢ Series is based on one simple principle: we believe that riding a bike indoors should feel as much like riding an outdoor bike as possible.
There are of course multiple similarities between riding indoors vs riding outdoors. Beyond the obvious differences, not needing to balance an indoor cycle for one, the claimed connection is that their Indoor Cycle feels like riding a bicycle outdoors.
But what does that mean? A feeling can be pretty subjective after all.
My review of the new Spinner® Blade Ion included a comment that I was a little disappointed that Star Trac continued with a friction resistance system, vs. the magnetic systems used by FreeMotion, Schwinn and Keiser.
I also teased you at the end of the post with:
Later that morning I also tried a little experiment that I’ve wanted to do for years…
What happens to your Power / Wattage when you accelerate from a set point, say; 100 watts @ 60 rpm to 90 rpm on friction based system, as compared to a magnetic system? Do they react the same way?
My apologies for the delay. I'm just getting to this today.
The ” little experiment” I conducted was something that I'd wanted to confirm/quantify for years, actually since I first started teaching on a Schwinn AC in 2010.
My early experiences riding/teaching with magnetic resistance, along with a discussion I had with Keiser's President Dennis Keiser, demonstrated to me that the amount of resistance created by the magnetic (Eddy Current) resistance system increased in lock step with a faster cadence / RPM. The faster you pedaled the harder (more force required) it was to turn the pedals.
Which is pretty much what you experience riding a bicycle outdoors, at speeds over 18mph. As you pedal faster (assuming you stay in the same gear) you and the bike move faster through the air. The faster you go, the more the resistance from the air pushes against you, making it harder and harder to turn the pedals.
There's a handy calculator to compute the amount of work it takes to overcome the resistance of the air here.
The difference in power needed to ride 25 mph vs 30 mph
So it takes apx. 300 watts to ride at 25 mph. To ride at 30 mph (just a 20% increase) you need to create over 60% more power. You can't make the power with additional leg speed – you're probably near your maximum efficient cadence already at 25 mph. To get to 30 mph you'll need to shift to a lower gear and push harder… A LOT HARDER!
Very different from the conventional friction system on an NXT – which (to me) feels like it gets easier to pedal, the faster I pedaled. In fact most of us can take what is a high level of load (at a slow cadence) and accelerate to the point where our legs spin-out and won't move any faster.
Side note: It's extremely rare to see someone riding with excessively high cadence on a magnetic resistance indoor cycle.
I've discussed this concept here in the past, but I couldn't prove or demonstrate it. I even went so far as contacting LOOK and Garmin to see if they would lend me a set of those new pedals with the built in power meter. They wouldn't and the crank arm from my FreeMotion doesn't fit on a NXT. It remained a mystery until now.
So while I was at the IHRSA convention, I finally had the chance to compare the new Blade Ion and the FreeMotion. With both cycles offering “measured power” I felt it would be a fair comparison; Magnetic vs Friction Resistance. Which best replicates riding outdoors?
Although I wasn't exactly “scientific” in my test protocol, nonetheless the results were very interesting.
Fun with graphs!
Here's what I did
My test was admittedly simple. After completing an early AM ride with Josh Taylor, I spent some time riding both the Spinner Blade Ion and FreeMotion S11.9. I began by establishing a steady 60 rpm cadence. Then I added resistance until the power meter showed 100 watts @ the 60 rpm. Then I accelerated to (and sustained) 90 rpm and took notes on what happened. I rode both cycles twice and the results were consistent. The blue Magnetic Watts line is more squiggly than the red Friction Watts line because I used the actual date set I downloaded directly from the FreeMotion's USB port.
I'd already tested the FreeMotion S11.9, so I knew that the 50% increase in cadence would result in a doubling of power. Perfectly consistent with my understanding of how Eddy Currents increase linearly with speed. A 50% increase in RPM = a 50% increase in resistance. Although math isn't my strong suit, it's easy to see how a 50% increase in Speed multiplied by a 50% increase in the amount of force required to turn the pedals = a 100% doubling in power/wattage. While not the same effect as what you'll find chasing down a breakaway at 27 mph, it is enough to force your students to work hard in a way that will help prepare them to hang with the “A” group.
The Spinner Blade Ion reflects the inherent weakness of using a friction pad with a heavy, perimeter weighted flywheel. The graph above clearly shows how the amount of resistance doesn't increase with additional speed – it actually goes down, validating what I had hoped to demonstrate. If it just stayed the same I should have observed 150 watts @ 90 rpm, I only saw 135 watts. So where did the other 15 watts disappear to? That's a math thing I'll leave to others smarter than me to answer. I will offer a guess that if I had continued on to 120 rpm, I would have seen a progressively lower increase in wattage vs what would be expected from a doubling of speed.
So what's this all mean?
Short answer – it's my opinion that magnetic resistance is superior in every way to a friction system. Besides being zero maintenance, the linear increase in resistance is much closer to what your participants will experience outdoors. Combined with the reduced inertia of the aluminum flywheel, magnetic cycles require more work to ride and force everyone to develop better pedaling technique. IMO the net results is that the members of your club or studio will (if they take advantage of it and you coach them properly) receive a more effective workout, that will translate to them becoming stronger outdoor cyclists.
So does that mean you wouldn't recomend the Spinner Blade Ion?
Not at all… it's an awesome cycle and that battery charger rocks. The purpose of this article was to demonstrate the differences so you can make an informed decision on your own. Besides, if you're a Spinning® studio, what other choice do you have?
P.S. If you're going to be at WSSC – I'd love for you to try and replicate my test on a Blade Ion for yourself. Then report back with what you find 🙂
Originally posted 2013-05-04 17:03:45.
Many (if not most of us) were taught some variation of; “scrape gum off the bottom of your shoe” and “try to push over the top” as the “proper” way to describe how to pedal like a “real” cyclist. But is that correct? If we really want our participants to pedal like a cyclist, is this the best way to cue proper/efficient pedaling technique?
My recently completed professional bicycle-fitting with Chris Balser the Bike Fit Guru says not necessarily.
I spent about two hours actually riding my VeloVie bicycle on a computrainer during my fitting. Not continuously and never at anything beyond a JRA level of effort. Early in the process Chris asked me; “where did you learn how to pedal?” Thinking that with way over 15,000 miles pedaling a bicycle, I've gotten to be a pretty good pedaler. So like most proud people I got defensive at his suggestion. Chris must of noticed it on my face because he quickly added; you're very smooth… but your ankle is all locked up. You are missing out on a bunch of power that's available if you'd #1) unlock your ankles and #2) focus on moving your knees through the greatest range of movement possible.
USA vs. EU pedaling techniques
To demonstrate what he was talking about he had me watch myself pedaling in a mirror from the side. My years of concentration on pushing over the top and scraping across the bottom showed Chris' observation was correct – I am smooth but my ankles were nearly locked solid with my foot at a right angle to my lower leg. That, he explained, was how people in the USA pedal.
Then he showed me a number of pictures of professional cyclists like this one of a very fast tandem team from the UK:
From http://magazine.bikeradar.com
Notice how high this captain's heel is as it crosses over the top? The idea here is that by allowing the ankle to flex and the heel to rise, you create a longer lever. Longer levers create more leverage and the force can begin earlier in the down stroke = more power. When you watch a cyclist using this technique, you'll see what Chris called “big knees” – the riders knees move in a very large plane up and down. It isn't just that their legs are long or that they're riding with long cranks. The exaggerated movement of their knees comes from the additional rage of motion allowed by the flexion of their ankles.
In this video, Joe Friel demonstrates the USA focus on “push over the top and scrap across the bottom.”
Former UK professional cyclist Rebecca Ramsay runs EasyCycling.com and her video below is an excellent example of what Chris describes as the EU pedaling technique. A closeup view of this technique in slow motion begins at the 2:00 mark. Notice how much flexion she has in her ankle as it crosses the bottom. Yes she cues the “scrape across the bottom” but no push across the top. With your heel elevated there's really no way to “push” forward… just down in a strong, fluid motion that I'm learning can create some much needed, additional power from my 52 year old legs 🙂
So who's right? Good question… but I'm not sure it's the right question.
A better question would be; which way of cuing, USA or EU, will be easier to understand by our students? Or would a combination / hybrid be helpful?
I've got two assignments for you to compete and report back:
#1 – Next time you're on a bike give this a try. Concentrate on what Rebecca cues as “a flick of the ankle” at the bottom. You may feel your calf contract slightly which you'll see in the video.
#2 – Watch a stage of the Tour De France. Pay attention to the vertical movement of the rider's knees and then let us know what you find.
Originally posted 2013-07-11 14:45:12.