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You might feel an imbalance of strength in your legs or you might fatigue on one side faster than the other, making single-leg exercises valuable. (Photo: Challenge Family)<\/p>\nPublished December 22, 2025 06:00AM<\/p>\n
A guide to balancing your leg strength for more efficient cycling<\/p>\n
In triathlon, speed comes from our aerobic engines, muscular force and endurance, and efficiency of movement. While swim and run form often get attention, a smooth, efficient, balanced pedal stroke in cycling tends to get overlooked.<\/p>\n
While all three disciplines interact to produce the central cardiovascular adaptations that improve our aerobic engines, muscle adaptations are more sport-specific \u2013 hence, why the world\u2019s best marathoner can\u2019t jump onto a bike in the Tour de France, and vice versa.<\/p>\n
One simple way to improve pedal stroke balance and efficiency, and to enhance cycling-specific muscular adaptations, is through single-legged cycling work.<\/p>\n
Why single-leg cycling exercises are important for triathletes
\nYou might feel an imbalance of strength in your legs or you might fatigue on one side faster than the other, making single-leg exercises valuable. (Photo: Challenge Family)<\/p>\n
The increased popularity of dual-sided power meters, particularly pedal-based systems, has only served to make this easier. These systems can offer valuable diagnostic insight into pedal stroke efficiency and side-to-side balance.<\/p>\n
While most athletes will see small imbalances, larger differences or a side that fatigues faster may point to a need to work on emphasizing one leg over another.<\/p>\n
For example, I\u2019ve come to learn that despite my chronic left-sided hamstring\/gluteal issues being under control pain-wise, that leg still has the tendency to slack off on the bike, causing me to lose overall power and overload my right leg as rides progress.<\/p>\n
My power pedals give me real-time, quantifiable feedback that I can use to see this and consciously address it in training since my perception of balance does not always equal reality.<\/p>\n
Sure, it sounds good in theory and with that n=1, but does single-legged cycling actually have benefits? Research backs up that it does.<\/p>\n
Because the work is localized to one leg, single-legged cycling allows for greater muscular adaptations<\/a> than its double-legged counterpart as it is not limited by central (cardiovascular) capacity, but more peripheral (muscular) fatigue. This produces increased local blood flow<\/a> (research has found anywhere from 30-90%<\/a> higher at matched work rates), allowing for each leg to perform more work individually with lower overall cardiovascular stress.<\/p>\n Additionally, single-legged cycling results in greater metabolic and oxidative benefits<\/a> locally at muscles, such as improved glucose transport and oxidation. It can increase mitochondrial capacity, leading to enhanced oxygen delivery and extraction<\/a> and VO2max improvements of about 7%<\/a> in the trained leg.<\/p>\n While overall perceived exertion and total cardiovascular load during single-legged cycling are lower than in double-legged cycling, time-trial performance<\/a> and double-legged VO2max<\/a> have been shown to be maintained over 3-7 week timeframes of single-legged training.<\/p>\n So, don\u2019t stress that you\u2019ll lose central fitness by incorporating some single-legged training, especially as study protocols are far more extreme than adding in a few targeted rides.<\/p>\n How single-leg cycling exercises work<\/p>\n Single-legged cycling does differ a bit biomechanically from double-legged cycling. Both methods require similar quadriceps, hip extensor, and ankle work during the downstroke, but in double-legged cycling, the upstroke is more of a passive process that occurs while the opposite leg presses down on the pedal. Without this counterbalance in single-legged cycling, the upstroke becomes a more active action, requiring increased hip flexor<\/a> and hamstring<\/a> work.<\/p>\n While advanced methods such as counterweights and springs have been implemented in research to help mitigate this, simply emphasizing one leg<\/a> more (at around a 3:1 ratio), instead of fully unclipping, has been found to be an easy, practical way to minimize biomechanical differences \u2013 something that dual-sided power meters can easily quantify, as well.<\/p>\n As triathlon season wraps up and athletes move into the off-season, all athletes can benefit from using this time to layer in some single-legged work once or twice a week, particularly those whose limiters include identified left\/right power imbalances or leg muscles that tap out long before their hearts and lungs.<\/p>\n What\u2019s the best way to incorporate single-legged cycling into your training? As just mentioned, emphasizing one leg while de-emphasizing the other is more biomechanically natural, particularly when you can use dual-sided power information to quantify the loads.<\/p>\n Interval training<\/a> has also been shown to produce superior adaptations to moderate intensities when matched for total workload, and likely will feel more palatable as localized muscle fatigue sets in.<\/p>\n
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Use these single-leg workouts to isolate your weaker leg to strengthen it. (Photo: Challenge Family)<\/p>\n