Is there anything to back this up? The people I know who work out are always complaining about their muscles and joints.
https://www.researchsquare.com/article/rs-5753318/v1 (pre-print) seems to provide a strong argument for strength training being beneficial. My search was not thorough so likely more studies out there.
In Ireland, jail time is rare for such offences sadly. In cases where jail time is sentenced, overcrowding in prisons often results in early release.