Overdoing it physically and training to go slower by hitting a lot of range balls at targets. CHS training has zero to do with accuracy… that’ll come later and besides your swing is changing. Must have adequate recovery time for fast twitch muscles to store anaerobic energy… about 24 hours of rest / non-anaerobic activity. (Think days off for MLB pitchers) Focus on Stack on alternate days and hitting only a few range balls afterwards if you want. No more than a handful of full out rips with driv