Depends on how many miles you are doing. If you only want to do 1 mile at 7 min, then that is doable, if you want to do 10k at that pace... I reckon you'd have

Depends on how many miles you are doing. If you only want to do 1 mile at 7 min, then that is doable, if you want to do 10k at that pace... I reckon you'd have to be a VERY fit and strong runner.