Louie Simmons’ Bands and Chains: What Variable Resistance Does
Louie Simmons made bands and chains famous by loading the bar heavier as a lift gets easier. Here is how it works and what research says about strength, power, and muscle.
Chris Pruitt
Chris Pruitt is a certified ASFA personal trainer and the founder of WorkoutHealthy, a fitness equipment retailer serving customers since 2007. He has more than 16 years in the fitness business, and he writes and fact checks everything published on Insider.
990 Pounds for Five Reps: What Joe Mackey’s Viral Hack Squat Actually Proves
Joe Mackey loaded 990 pounds onto a hack squat machine for 5 reps in March 2023. Here is what is verified about the lift, why the machine lets lifters chase loads like this, and what the science says about training this way.
Method Man’s 10 Sets of 15 Bench Press: What the Workout Shows
Method Man reportedly tackled 10 sets of 15 bench reps. Here is what the workout shows, what his own interview confirms, and how to scale the idea.
Marisa Tomei Skips the Gym. What Her Walking Habit Really Means
Marisa Tomei says she favors walking, sleep, and time outdoors over gym workouts. Here is what her personal routine can teach us, and what it cannot.
Pharmacy Cash Price vs Insurance Copay: What the USC Study Found
An insured copay may exceed a pharmacy cash quote. Here is what the USC clawback study actually measured, its correct $7.69 figure, and how to compare prices safely.
Blood vs Tissue TMB: What Immunotherapy Tests Really Show
Blood and tissue tumor mutational burden tests can disagree. Learn what a 2026 paired-sample analysis found and why one TMB number cannot predict your immunotherapy outcome.
Urine Cancer Tests: Why Bladder and Ovarian Differ
Urine markers can add information in bladder cancer care, but they do not replace cystoscopy. Ovarian urine tests remain experimental.
5 Running Workouts to Get Faster Without Racing Every Run
Strides, fartlek, intervals, tempo runs, and progression runs stress different parts of running performance. Learn how each session works, what popular descriptions get wrong, and how to add speed without turning every day into a race.
Does Exercise Add to Daily Energy Burn? What a 2025 PNAS Study Found
A 2025 PNAS study linked higher physical activity with higher daily energy expenditure. Here is what its observational design found—and what it cannot prove.
How Lily Rabe Trained for Tell Me Your Secrets: Strength, Stunts, and Context
A dated 2021 interview explains Lily Rabe’s strength and stunt preparation for Tell Me Your Secrets—and what readers can safely take from it.