1. Not eating enough
Weightlifters who maintain an intense training schedule may also cut back on calories. This can negatively affect health and performance. If your body consistently draws on its energy reserves, you may develop nutritional deficiencies such as anemia.
More serious conditions can arise that affect your cardiovascular, gastrointestinal, and endocrine systems. It’s also possible to develop nervous system and reproductive system complications, including period loss or irregular cycles.
2. Soreness, strain, and pain
Pushing yourself past your limits during a high-intensity interval training (HIIT) workout can lead to muscle strain and pain. Overstressing your body can cause soreness and injuries. You may experience microtears in your muscles as well.