Coach Tief explains how to start running, how to to run faster, and how to develop a running schedule. Use these principles to reach your running goals!

Training for a half marathon or marathon? Whether you want to improve your time or simply finish the race, learn how to build endurance and run faster!

Running requires fitness, but the mental components (perseverance and courage) can’t be forgotten. Increase your mental toughness and become a better runner!

Tired of your usual running workout? Spice up your daily run, learn how to get faster, and become a better runner with five new workouts from Coach Tief.

Get tips for breathing while running! Learn the proper way to breathe during a run, how often to take breaths, and how to relieve a side cramp.

Running is physically and mentally taxing, so you should take physical and mental approaches towards becoming a better runner. Start by setting SMART goals!

Hit a forehand shot like Nadal or Federer in four basic steps! This quick tennis lesson covers the semi-western grip, which gives extra topspin.

Learn how to improve your tennis serve! Find out where to stand, how to grip the handle, and discover the four basic steps of how to swing your racket.

The ball's in your court. Now what to do with it? Learn how to position yourself, move, and swing to return service and break your opponent's serve.

Improve your backhand punch volley in four easy steps! This beginner tennis lesson takes you through the positioning, grip, and swing for the backhand volley.