FITT Principle Examples for Adults, Pregnancy, Diabetes and Youth
See the FITT principle in action with sourced examples for adults, pregnancy, type 2 diabetes and youth, plus a simple one-variable adjustment log.
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.
Linear vs Undulating Periodization: Plans and Evidence
Compare linear and daily undulating training with a matched-rep three-week example. See what direct studies and meta-analyses found about strength and muscle growth.
368 Pounds, Legs Strapped Down: Folashade Oluwafemiayo’s Paralympic Bench Press Record
Folashade Oluwafemiayo pressed 167 kg (368 lb) to win gold at the 2024 Paris Paralympics, a world record in a sport that is bench press only, with athletes' legs secured for the entire lift.
Gym Mishaps: 3 Reported Cases and Practical Lessons
What a caught shoelace, unsecured restraint and misunderstood spot show about gym mishaps, with specific questions and clear limits on trying again.
Kristine Lilly Ran Boston at 54: The Preparation Behind the Finish
Kristine Lilly completed the 2026 Boston Marathon at 54. Her own account reveals a multi-month training build and two causes behind the miles—and corrects the race-count shorthand.
Huangdi Neijing: Reading Its Rest and Seasons Passages
A source-located guide to Huangdi Neijing passages on work, rest and seasons, with translation context and clear limits on modern fitness claims.
JoJo Siwa’s Two-Hour Workout: What to Borrow and What to Scale Back
JoJo Siwa’s reported two-hour workout mixed rope, upper-body work, core, and treadmill intervals. Here is what the session shows—and why you need not copy its length.
Who Trained Cú Chulainn? Scáthach and the Source Texts
Scáthach is the famous answer, with Domnall as an earlier teacher. A comparison of two Meyer translations shows which training details belong to which text.
Terry Crews on Training for Brain and Body
People keep exercise in their lives for many reasons. Terry Crews explains his reason in a way that moves beyond appearance or a single milestone. He describes reaching a point when he saw training as something that mattered to both…
Isometric Handgrip: What Blood Pressure Trials Show
Handgrip trial results depend on who was studied, what the control group did and when pressure was measured. Compare the actual evidence, analysis limits and questions for your care team.