Been doing some “Intervals” – short, intense bursts of aerobic exercise, followed by short rests and more hard bursts – in preparation for the Head of the Charles Regatta in October. Intervals are plenty hard, if you do them right, but I have the unfortunate sense that they are the key to good aerobic shape and fitness. Lately have been rowing “ladders”: that is, going as hard as you can for one stroke, then one easy stroke. Then two hard and two easy and so on. All the way up to 17… the top of the ladder. Then down again. Trust me, it is exhausting. But I sense that it is already having a real impact on my old body.
Preliminary conclusion: Intervals are a key ingredient of aerobic exercise for just about every one.
Dreary news: EXCEPT that it makes you feel wonderful. Eventually.