A 51-year-old personal trainer shares his 20-minute workout to build an maintain muscle

Celebrity trainer Harley Pasternak shared his approach to fitness at age 51. His primary goal is maintaining muscle mass to combat age-related loss. He follows a strict 20-minute daily strength routine six days a week.

Pasternak focuses each session on two major muscle groups and one core movement. By alternating muscle groups daily, he allows specific areas time to recover. This timing is critical for his current fitness level compared to his younger years.

His method relies on high volume in short bursts. A typical session involves alternating between two exercises for a specific number of reps, starting at 20 and decreasing with each set until reaching 13. He adds a core movement like a pike plank between these sets to ensure his midsection stays engaged.

Variety is a core component of his plan. Pasternak rotates through different movements for the same muscle groups to avoid boredom and keep his body responding to new stimuli. While he prioritizes strength training, he does not perform traditional cardio. He maintains his heart and mental health by walking 12,000 steps every day.

This routine highlights that intensity and frequency do not require hours in the gym. By keeping workouts short and specific, he keeps his schedule manageable while addressing the realities of aging.