30/05/2026
So why has Usain Bolt never done a 5K run?
Because heās not training for endurance - heās training for power, speed, and explosive force. Alongside sprinting, heās doing weight training, jumps, and other explosive work. And his body reflects exactly that.
Sprinters and distance runners donāt just look different - they are different. Their training builds fundamentally different adaptations in the body, through different muscle fibre types. Jogging develops endurance and the ability to sustain low levels of effort for long periods, using slow-twitch muscle fibres. Sprinting develops power, speed, and the ability to produce maximum force in a very short time, relying on fast-twitch muscle fibres.
Endurance training improves cardiovascular efficiency and fatigue resistance, but high volumes of it donāt maximise strength or muscle mass, and when it isnāt balanced with strength work, it will limit power development.
Now ask yourself what actually matters more as you get older. Being able to jog for another 30 minutes, or being able to catch yourself when you trip? Having the strength to lift something heavy, climb stairs with ease, or get up off the floor without assistance?
Fast-twitch muscle fibres are responsible for speed, power, strength, and reaction time. Theyāre what allow you to react quickly, regain balance, jump, climb, push, and pull effectively. They play a major role in maintaining muscle mass and physical independence as you age - and they are among the first qualities to decline if they are not trained.
You donāt usually fall because your endurance failed. You fall because you couldnāt produce force quickly enough to correct it.
Now, if you love jogging, keep going - thereās nothing wrong with a bit of cardio. But remember that the goal isnāt just fitness. Itās independence, longevity, strength, and the ability to respond when life doesnāt go to plan.