Mixed

Training to muscular failure elongates recovery time courses and increases fatigue perception compared to non-failure training, potentially impairing subsequent performance if insufficient recovery time is allowed between sessions.

Avoid training to failure on exercises scheduled before high-priority sessions (like heavy singles or technical lifts). Reserve failure training for isolation movements, the last set of a session, or when you have ample recovery time (48+ hours) before training the same muscle group again. This preserves performance for important lifts.