The bench press can train either muscular strength or muscular endurance depending on how you perform it. The exercise itself is neutral. What determines the outcome is the weight you load and the number of reps you perform. A heavy set of 3 reps builds strength; a lighter set of 20 reps builds endurance. Same movement, completely different training effect.
How Weight and Reps Change the Training Effect
Exercise scientists describe this as the “repetition continuum,” and the breakpoints are well established. Lifting 80% to 100% of your one-rep max for 1 to 5 reps per set optimizes strength gains. Moderate loads at 60% to 80% of your max for 8 to 12 reps target muscle growth (hypertrophy). Light loads below 60% of your max for 15 or more reps develop local muscular endurance.
So if your one-rep bench press max is 200 pounds, pressing 170 pounds for 3 reps is strength work. Pressing 100 pounds for 25 reps is endurance work. The bench press doesn’t belong in one category. Your programming puts it there.
What’s Actually Happening in Your Muscles
The reason these rep ranges produce different results comes down to energy systems and how your muscles adapt over time.
When you grind out a heavy single or triple, your muscles rely on stored energy called phosphocreatine. This fuel source is immediately available but runs out in about 5 to 10 seconds of maximum effort. That’s why heavy sets are short, and why the American College of Sports Medicine recommends resting 3 to 5 minutes between strength-focused sets: your muscles need time to replenish that quick-burn fuel.
When you perform a lighter set of 15 to 25 reps, the effort lasts much longer. After roughly 10 seconds, your body shifts to breaking down stored sugar for energy through a process called anaerobic glycolysis. This system can sustain effort for one to three minutes but produces metabolic byproducts that create that familiar burning sensation. Over time, training in this zone teaches your muscles to resist fatigue and clear those byproducts more efficiently. That’s muscular endurance.
Endurance training also calls for much shorter rest periods, typically under 90 seconds. The short rest is part of the training stimulus. It forces your muscles to keep working before fully recovering, which is precisely the adaptation you’re after.
Long-Term Adaptations Are Different Too
Strength-focused bench pressing produces increases in muscle size, improvements in how your nervous system recruits muscle fibers, and greater maximal force production. Your brain gets better at firing more muscle fibers simultaneously, which is why beginners often get stronger before they get noticeably bigger.
Endurance-focused training shifts the adaptation toward your muscles’ internal machinery. Your muscle cells develop more mitochondria (the structures that produce sustained energy) and become better at using oxygen and clearing waste products. You won’t necessarily press more weight, but you’ll press a given weight many more times before fatigue sets in.
The NFL Combine: A Real-World Example
The NFL Scouting Combine gives a perfect illustration of this dual nature. Prospects lie down on a bench and press 225 pounds for as many reps as possible. The NFL itself describes this as “the ultimate test of muscular strength and endurance for the upper body.” You need enough raw strength to move 225 pounds in the first place, and enough endurance to keep repping it.
Training programs for the Combine reflect this. Athletes typically split their preparation into two distinct sessions: one day focused on heavier weights with fewer reps to build upper-body power, and another day using lighter loads taken to failure to build max endurance. Both sessions use the bench press, but the goals are opposite.
Can You Train Both at Once?
You can, but there are trade-offs. When researchers examined what happens during concurrent strength and endurance training, they found a phenomenon called the “interference effect,” first documented in 1980. Training for endurance can blunt your strength and power gains compared to focusing on strength alone.
The good news for bench pressers specifically: a large systematic review found that upper-body strength was less affected by concurrent training than lower-body strength. The interference effect was small to nonexistent for upper-body pressing movements, regardless of sex. Power output (think explosive speed off your chest) showed a small-to-moderate interference in both men and women, so if bar speed matters to you, mixing high-rep endurance work into a strength cycle could slow your progress.
A practical approach is periodization: spending a few weeks emphasizing strength with heavy, low-rep sets, then rotating into a phase with lighter, higher-rep endurance work. This lets you develop both qualities without them competing directly for the same adaptation window.
How to Choose Your Approach
Your goal determines your rep range. If you want to increase the maximum weight you can bench press for a single rep, keep most of your working sets between 1 and 5 reps at 80% or more of your max, with long rest periods of 3 to 5 minutes. If you want to rep out a submaximal weight more times, as in a push-up test, a military fitness assessment, or the NFL Combine, train with loads under 60% of your max for sets of 15 or more reps with rest periods under 90 seconds.
If you’re a general fitness trainee who just wants to get stronger and more resilient, the 8 to 12 rep hypertrophy range is a reasonable middle ground. It builds both a foundation of strength and some degree of muscular endurance, even though it doesn’t maximize either one. Most recreational lifters spend the majority of their training here and get solid results on both ends of the spectrum.