ttrider said:
to what extent do you need to go to the gym to work on leg muscles to increase cycling performance, i always feel like i find it hard to push the pace up from cruising speed of 22 mph up to 26-30 miles an hour whilst remaining in the sadel whilst i notice other appear not to, would anyone recomend any leg specific work outs/exercises to increase leg strength and increase power on the flat
The limiters to
endurance cycling performance are aerobic metabolic ones, and not leg strength.
The forces involved in cycling are significantly sub-maximal, such that we rarely, if ever, apply such maximal forces or near maximal forces when riding a bike. Remember that maximal force (strength) can only be applied at zero velocity, which is not something that occurs when pedaling in endurance cycling events.
Note also that the average effective pedal force for both legs even when riding at 400 watts / 100rpm / 175mm cranks is equivalent to ~22kg (218 N).
Indeed exercises to increase leg strength (max force generation capacity) induce physiological changes that run counter to those required to improve sustainable power output such as:
- increased mass for no comparable increase in sustainable power,
- reduced mitochondrial density,
- increased diffusion distance for exchange of gases and key metabolites,
- reduced capillary density
In short - the best exercise for enabling one to ride a bike faster, is riding a bike with sufficient durations and intensity (level of effort) to induce the necessary adaptations.
Finally - your expectation of making speed changes of the order you are outlining are audacious, if you don't also consider means to reduce the resistance forces acting against you.
With no change to resistance forces (e.g. better aerodynamics), to increase speed by from 22mph to 26mph, requires an increase is sustainable (aerobic) power of ~ 55%, and to get to 30mph would require a more than doubling of your power output (125% increase).