Celebrity trainer Nick Mitchell, founder of the gym chain Ultimate Performance, has proposed an unconventional warm-up technique. Instead of the traditional approach of starting with light weights and high reps, Mitchell suggests warming up with heavier weights for low reps. This method, he claims, primes the muscles more effectively for the upcoming workout.
  

Key Points: 

1. Nick Mitchell’s method involves warming up with weights heavier than one’s intended working weight, but only for 2-3 reps.
2. This technique activates the nervous system more efficiently and helps in recruiting a larger number of muscle fibers.
3. When the heavier weights used during the warm-up are replaced with the intended workout weights, they feel significantly lighter, making the workout feel easier.
4. Although Mitchell’s method emphasizes using heavier weights, he still emphasizes the importance of an appropriate warm-up to avoid injuries.
5. Mitchell’s strategy can be a potential method for overcoming muscle-building stagnation.

Source: https://www.menshealth.com/uk/building-muscle/a45317166/warm-up-hack/