Training Guides

Are Sit-Ups Bad for Your Back? What the Spine Research Says
Are Sit-Ups Bad for Your Back? What the Spine Research Says
The research on repeated spinal flexion is more conditional than most fitness content admits. What the biomechanics lab actually measured, the limitations of that evidence, and why the answer depends... Read more...
Can You Build Real Upper-Body Strength Without Weights?
Can You Build Real Upper-Body Strength Without Weights?
A meta-analysis found no significant difference in strength gains between elastic resistance and conventional weights — provided the training effort is comparable. Here is what that does and does not... Read more...
How Long Should You Actually Stretch? The Numbers From the Research
How Long Should You Actually Stretch? The Numbers From the Research
Most stretching advice is vague on the only thing that matters: how much. The research is more specific — and one of its findings will probably surprise you, including how... Read more...
Pilates Bar vs Reformer: What Actually Works in a Small Apartment
Pilates Bar vs Reformer: What Actually Works in a Small Apartment
A reformer is a better machine. That is not the interesting question. The interesting question is what produces results in a room where a reformer will never fit — and... Read more...