Karl Knopf, EdD

Karl Knopf, EdD, former director of fitness therapy and senior fitness for the International Sports Sciences Association and retired director of adaptive fitness at Foothill College in Los Altos Hills, California. He is author of Total Sports Conditioning for Athletes 50+, Weights for 50+, Core Strength for 50+ and numerous other fitness books.

Don’t Let Injuries Hold You Back

Don’t Let Injuries Hold You Back

Karl Knopf, EdD | April 26, 2023

Are you keeping active as you age by playing a sport? Many adults enjoy golf, tennis and other activities well…

Improve Your Functional Fitness
Exercise & Fitness

Improve Your Functional Fitness

Karl Knopf, EdD | February 1, 2022

Have you stopped riding a bike, bowling or playing golf or tennis because these activities are too hard to perform?…

How to Stretch and Roll Away Your Aches and Pains
Aging

How to Stretch and Roll Away Your Aches and Pains

Karl Knopf, EdD | October 7, 2020

Stretching your muscles is as vital as aerobic exercise and weight training. Here, easy stretches for your neck, back, shoulders, hips, feet, more.

6 Common Stretching Mistakes That Can Hurt You
Exercise & Fitness

6 Common Stretching Mistakes That Can Hurt You

Karl Knopf, EdD | January 31, 2017

Are you stretching all wrong? There’s a good chance! Our expert reveals six common stretching mistakes—and what to do instead.

A Fun and Easy Way to Get Much Stronger

A Fun and Easy Way to Get Much Stronger

Karl Knopf, EdD | March 22, 2016

If you’ve ever been in physical therapy, you’ve likely used a stretchy latex tube or flat strip called a resistance…