Lactate isn't the reason you're sore a few days after upping your weights or exercising after a long break. So, if it's not ...

While soreness is natural after trying a new workout or training for improved strength, hypertrophy (muscle growth), and endurance, there's a fine line between the "no ... all of which help ease ...

No matter what you do, a cool down is key for recovery, and, basically, you gotta stretch. So, if you're not sure where to start and your aching bum muscles ... form in gyms all over London.