Best 90 Minute Workouts & Exercises

For the average person, yes, but for specific goals, it is necessary. Powerlifters need 90 minutes because they require 5 to 10 minutes of rest between maximal sets. Endurance athletes need 90 minutes to build aerobic capacity in Zone 2. However, for general fitness, pushing beyond an hour often leads to "junk volume" where the effort level drops.

A 90-minute session should be reserved for high-volume hypertrophy or strength-endurance days. It allows for a thorough 20-minute warm-up, 50 minutes of heavy lifting including compound and accessory movements, and 20 minutes of dedicated mobility or steady-state cardio to build work capacity.

Generally no. Beginners do not have the work capacity to sustain high-quality effort for that long. They will likely reach technical failure, where form breaks down, long before the 90 minutes are up. It is better to do 45 minutes of high-quality work than 90 minutes of sloppy reps.

You need to manage your fuel sources. Your body's glycogen stores typically deplete after 60 to 75 minutes of hard work. To sustain performance for 90 minutes, you should consider intra-workout nutrition such as cyclic dextrin or simple carbs to maintain blood glucose levels and prevent catabolism (muscle breakdown).

Due to the high systemic fatigue, two to three times per week is usually the limit. If you are training with high intensity for 90 minutes every day, you risk overtraining and central nervous system burnout. These long sessions should be spaced out with rest days or shorter active recovery sessions.