VO2 Max Intervals: How to Choose a Format
VO2 max intervals can be short or long. Compare what studies tested, what remains uncertain, and how to choose a controlled format for your sport.
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.
Zdeno Chara’s Six-Star Timeline: Tokyo First, Boston Personal Best Next
Zdeno Chara earned Six-Star status in Tokyo, then ran a Boston personal best seven weeks later. Here is the accurate timeline and what runners can take from it.
J.K. Simmons’s Viral Gym Photos at 61: The Justice League Myth
J.K. Simmons said his viral gym photos at 61 were not for Justice League. Here's his firsthand correction, what is not known about his diet or program, and the evidence on strength after 60.
Push-Up Progression: Choose Your Next Step by Goal
Use a wall-to-floor push-up progression, a repeatable session log and goal-based choices after floor reps. Progress by control and performance, not a deadline.
T.J. Holmes’s Marathon Majors Record: NYC Finishes and a Chicago DNF
NYRR verifies T.J. Holmes's 2023 and 2024 NYC Marathon finishes. His 2024 Chicago outing was a DNF. Here is the accurate Majors timeline and what runners can learn.
How Krysten Ritter Used Boxing to Prepare for Jessica Jones
Krysten Ritter says boxing helped her prepare for Jessica Jones. Her firsthand interviews also reveal strength circuits, bodyweight work, running, hiking, and yoga—not a single magic workout.
Cynthia Erivo Ran a Faster London Marathon—and Calls Running Meditation
Cynthia Erivo's reported 2026 London Marathon time improved by 13:56. Here is the verified race timeline, her firsthand reflections, coached training, and what everyday runners can learn.
Jordan Litz’s 2026 NYC Half Was Not His Two-Show Marathon Day
Jordan Litz joined the 2026 NYC Half, but the famous two-Wicked-shows feat followed his 2025 full marathon. Here is the verified timeline and training lesson.
Millennial Grip Strength: Are Young Men Really Weaker?
Trace a grip-strength headline from its study to news and discussion.
4,888 Pulls, 3 Hours 19 Minutes: The Million-Pound Lat Pulldown Record
James "Geezer" Smith moved a cumulative 1,000,000 pounds on a lat pulldown machine in 3 hours 19 minutes, a feat verified by Record Holders Republic, not Guinness. Here is the real math and training science behind it.