Evening workouts disrupted my sleep, so I adjusted my routine

The article reports that intense late workouts can raise core temperature and stress hormones and delay sleep, and that switching to lower-intensity evening sessions with longer cooldowns was linked to improved sleep and steadier energy.

Many people exercise late and expect to sleep well afterward. The article describes nights of difficulty falling asleep and restless recovery after hard evening workouts. Experts say the problem is linked to higher core temperature and activation of stress responses after intense training. The author reports that shifting to lower-intensity evening sessions and longer cooldowns helped restore sleep and daily energy. Key details: - Intense evening exercise raises core temperature by about 1.8–3.6°F, which can signal the body to remain alert rather than prepare for sleep. - High-intensity training activates stress responses, including increases in cortisol, which follows a daily rhythm and is normally higher in the morning. - A 2025 Monash University study of 14,689 people across more than four million nights found that high-strain exercise close to bedtime delayed sleep onset and reduced sleep quality, especially when performed within four hours of bed. - Sleep experts quoted in the article include Sara Mednick, who described modern life as a source of chronic alertness, and Carla DiGirolamo, who emphasized longer cooldowns after late training to bring the nervous system back toward baseline. - The article notes post-workout habits reported to support sleep: lighter resistance or mobility work at night, longer cooldowns with stretching or breathwork, a hot shower before bed to aid cooling, and slower breathing to calm the nervous system. Summary: The reported impact of late, high-intensity workouts was poorer sleep, lingering fatigue, and slower recovery. The article describes that moving evening sessions toward lower-intensity activity and lengthening cooldown routines was associated with improved sleep and more consistent energy the next day. Researchers and experts highlighted timing and intensity as key factors that relate to sleep quality.