Recovering from a sprint is the hard bit - with adrenaline I think there are a lot of unfit people who could run incredibly fast over a short distance.
But their cardiovascular system and groin/hamstrings/quads will have something to say about it in the aftermath.
I track my VO2 max using my watch and found the absolute best activity for me at least (after Couch to 5K to get my body used to moving again) is doing interval training (fartlek) and cadence drills. Running for an hour can be easy once you've done a bit of practice, but doing sprint intervals for 20 mins can really make you feel like you've run a marathon.
But their cardiovascular system and groin/hamstrings/quads will have something to say about it in the aftermath.
I track my VO2 max using my watch and found the absolute best activity for me at least (after Couch to 5K to get my body used to moving again) is doing interval training (fartlek) and cadence drills. Running for an hour can be easy once you've done a bit of practice, but doing sprint intervals for 20 mins can really make you feel like you've run a marathon.