GOOD, BETTER, BEST
When it comes to aerobic fitness training here's the recipe.
4 times a week is good, 5 times is better and 6 times is best.
20 minutes is good, 30 is better and 40 is best.
Heart rate of 120 beats per minute is good, 130 bpm is better and 140 bpm is best. That's based on the recommendations of any one who's around 40 years of age, but can be extended to well over 70 if you're in good nick.
On the track
O woe is me. Just turning around the McDonald's marker and I felt a twinge in the upper part of my left calf. Had to walk the rest of the way home.
Went to the gym after work and had a good workout.
In the meantime stay tuned, highly tuned and remember, good, better, best and never let it rest, 'til your good is better and your better is best.