Why not just work on running 6.6-7 60m first then spend a month practicing on pushing the sled? Seems a lot more useful than suboptimal speed training with a sled when you need large advances in speed to make the practice worth while.
Why not just work on running 6.6-7 60m first then spend a month practicing on pushing the sled? Seems a lot more useful than suboptimal speed training with a sled when you need large advances in speed to make the practice worth while.