I don't know if this has ever been posted here so I thought I would do it. Here is a brief quote:
"This study measured the effect of single-season pitching on player-reported fatigue, player-reported pain, objective strength, and range of motion in high school fast-pitch softball pitchers before and after games both at the beginning and at the end of a single high school season. We found that shoulder strength decreased significantly through the course of a game throughout the season. Also, more games pitched during the season significantly increased pregame pain and fatigue while decreasing pregame shoulder strength. The cumulative effects of pitching through the course of the season, particularly more than ten games, appear to predispose pitchers to increased pain and fatigue."
One surprise for me was the decrease in measured strength. The study is filled with scientific language so just skip to the discussion and conclusion, unless you are in the field.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4916099/
"This study measured the effect of single-season pitching on player-reported fatigue, player-reported pain, objective strength, and range of motion in high school fast-pitch softball pitchers before and after games both at the beginning and at the end of a single high school season. We found that shoulder strength decreased significantly through the course of a game throughout the season. Also, more games pitched during the season significantly increased pregame pain and fatigue while decreasing pregame shoulder strength. The cumulative effects of pitching through the course of the season, particularly more than ten games, appear to predispose pitchers to increased pain and fatigue."
One surprise for me was the decrease in measured strength. The study is filled with scientific language so just skip to the discussion and conclusion, unless you are in the field.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4916099/