lads on a club fartlek session whilst still feeling chesty. Whatever you do, think about how you feel and don't be tempted to push too hard. Be prepared to cut your session down if you are feeling rough – so plan a route that allows you to bail early
running.2.For female runners, controlled anaerobic training intervals, hill reps, fartlek training may lead to gains in strength and speed similar to those produced by steroids, but without the noxious side effects. Why? High-intensity anaerobic
