Wow, I’m surprised there hasn’t been a flood of replies on this thread.
Weight training for cycling is typically a really contentious topic, the folks that believe in it tend to really believe in it and the folks that don’t tend to really rail against it. An awful lot of fiery debates have raged on the topic on many cycling sites, I wonder if the Slowtwitch folks are burned out on those debates.
FWIW, most folks agree some form of strength training applies to pure track sprinting events but in recent years even some of the more competitive track squads have moved away from the gym and are doing more of that strength work on the bike with things like standing starts and big gear accelerations. (e.g. Australia, NZ) The argument against standard weights is that the squat rack or leg press machines don’t train the specific muscle recruitment patterns and joint angles of cycling and strength built in non specific ways has to be transferred to the specific needs of the sport. But traditionally most short duration track racers have spent a lot of time in the weight room and many if not most track coaches still swear by it.
For events over about a minute or so in length (about anything longer than the kilo on the track) there’s a lot less support for trying to build muscle and less support for pure strength training. But still lot’s of folks either hold onto a belief that bigger muscles will make them faster or they point to other things like core strength as reasons to get into the gym. That’s the place where the debates rage. Plenty of road coaches rely heavily on weight training, mostly in the off season and their reasons are varied but it often revolves around sprinting and peak power. Others go with strength work on the bike again citing specificity and some think the weight work might be o.k. but at what cost to overall training time and time that could be spent on more valuable on the bike work or even dedicated to recovery for better on bike workouts.
There are studies and these get debated a lot as well. Some point to no advantage to weight training, others like one a few years ago claim that weight training improved time trial times but that’s been attacked on the basis of things like the weight group adding their weight training on top of the control group’s program so the two groups weren’t doing the same weekly training hours or workload but yeah there are studies that could be interpreted as supporting both sides of the issue.
Anyway, you’re not likely to get a clear answer as athletes and coaches alike tend to be dug in on one side of this debate or the other.
In terms of the two photos posted, one presumably of a track racer and the other of a roadie. That part is pretty clear, bigger hypertrophied muscles aren’t the best thing for endurance racing. Google ‘mitochondrial dilution’ or consider power to weight ratio for the reasons but they can be pretty useful for peak torque and peak neuromuscular power assuming that strength can be applied in a sports specific way which means either building it on the bike or doing a good job of transferring it to the bike. Not really any different than track and field sprinters vs endurance runners, not too many huge quads on marathon winners either.
One thing that’s really clear from science and simple power/torque analysis is that endurance cycling is NOT a strength limited sport. Anyone with a power meter and files that record crank torque can see this, it takes less than 50 pounds of average force on the pedals at 90 rpm to sustain 350 watts. If a reasonably sized adult athlete can walk up a flight of stairs and lift their body weight they can easily apply 50 pounds of force to the pedals. Or looked at another way, how many 50 pound single leg reps could most folks do on the leg press machine if they could do them at any pace of their choosing. Most folks could probably knock out those reps all day long if they weren’t in a hurry. The issue with sustaining that 350 watts isn’t leg strength and improving your one rep max leg press from say 250 to 350 pounds isn’t really going to change anything since the forces required in pedaling are already such a small fraction of most folk’s one rep limit. The key is doing those reps quickly and supplying the oxygen and fuel to sustain those muscle contractions, not the peak force required for each one and that’s why high capillary and mitochondrial densities are much more important to endurance cycling than muscle fibers with large cross sections (which leads to mitochondrial dilution as bigger cross sectional muscle fibers have more peak strength but at the expense of proportionally fewer mitochondria).
Personally I was coached to include a lot of lower body weights in my winter program for many years. It did not make me faster. I’ve gone away from that and put that time into things like 2x20 Threshold intervals and have gotten a lot faster with that kind of work year round. I still do some core work as cyclocross season approaches because I don’t want to throw my back out running around throwing a bike on my shoulder and some core work does seem to help my position on the bike, especially the TT bike but doesn’t seem to directly impact speed as much as comfort and general life health and posture. But plenty of folks swear by weight programs and if it works for them, great.
-Dave
well in the time it took to write this it looks like folks have jumped in. I’d think about what Felt says, that’s pretty much that heart of it IMO, pure strength and pure endurance fitness pull you in different directions and it’s hard to do both as well as you might do one or the other.