Low Reps Aren’t Worth It (for Muscle Growth)

Mike frames this as his personal answer to the converging risk factors in his life: age 41, multiple prior muscle and joint injuries, a bodyweight that more than doubled since starting training (100 lb → 225 lb), frequent travel fatigue, and a personality that loves consistent, injury-free training. The scientific literature gives him the green light because 10–20 rep sets grow muscle just as well as 5–10 rep sets when proximity to failure is equated. The core injury insight is that absolute load (e.g., plates on the bar) is the key variable; a fresh 5RM leg press of eight plates is far riskier than a fresh 15RM of five plates, even if both are taken close to failure. He emphasizes that later sets in a session may drop to 8 reps due to fatigue, but because that’s not the fresh RM, the actual absolute load is still lower and safer. This protocol intentionally sacrifices the ego lift and the specific neural adaptations of heavy low-rep work to buy a long, uninterrupted training career.

Mike explains that beginners lack the absolute strength to tear muscles or rupture tendons, so they can safely train in the 5–10 rep range. This range is a ‘magic’ zone where the weight is heavy enough to drive meaningful strength and hypertrophy adaptations but light enough that the lifter can maintain perfect technique on every rep. Anything below 5 reps for a novice often leads to breakdown and struggle, while sets above 15 reps introduce enough fatigue to degrade form and teach bad habits. Sticking to 5–10 reps with basic compound movements allows the beginner to build a robust physical foundation—dense bones, strong connective tissues, and well-patterned motor skills—that will support more specialized, higher-load or higher-volume training later. He explicitly differentiates this from adult fitness goals, where higher rep ranges can be used right away for cardiovascular and general health benefits.

Mike draws a sharp contrast between the intermediate explorer who says ‘yeah, let’s try stiff-legged deadlifts for sets of 20’ and the advanced lifter who already knows that ‘that probably not going to work for me.’ The advanced protocol is the payoff of the intermediate phase: every exercise and muscle has a tailored rep range. He emphasizes that this isn’t about rigid specialisation but about removing guesswork. The advanced lifter still changes rep ranges periodically—maybe a few months of slightly lower reps for a muscle, then a shift back—but never wanders into territory they already know is ineffective or risky. This level of personalization, he argues, is the ultimate unlock for long-term hypertrophy.

Mike details the compounding risk factors: prior injuries create weak points and scar tissue; getting bigger and stronger relative to your original frame increases the force you can produce through the same connective tissues; age reduces tissue resilience; and fatigue impairs coordination and may mask warning signs. He uses the car-speed analogy: going 10 mph into a tree is rarely catastrophic, but 90 mph is likely fatal; similarly, heavy loads dramatically increase the consequence of any small technique error or tissue weakness. The protocol is simply to shift the rep range upward, accepting the burn and the reduced ego gratification in exchange for longevity. He notes that when travel or poor sleep force a choice, always err on the side of higher reps—you can return to lower reps when conditions are safer.

Dr. Mike explains that he’s 41, has sustained injuries to virtually every body part, is much bigger and stronger than his genetic starting point (from 100 lb to 225 lb), and is often in a high-fatigue state from travel and work. He values consistent training above all else. The research showing equivalent hypertrophy from 5–30 RM sets gave him the confidence to abandon low reps entirely. For him, the absolute loads required for a fresh 5–8 RM represent a substantial acute and chronic injury threat—especially to scarred, previously injured tissues—while 10–20 RM training provides essentially the same muscle stimulus with far less risk. He can still get great pumps, progression, and mind-muscle connection with higher reps, and he no longer sees any compelling reason to flirt with heavy low-rep sets. The move is a permanent personal strategy, not a temporary phase.