In article , Keith Hobman wrote:
In article , Are 2 separate 20 minute
aerobic workouts as good as 1 40 minute workout? wrote:

I know that these things can get quite complex but "all things being
equal"

Are 2 separate 20 minute aerobic workouts daily as good as 1 40 minute
aerobic workout daily ?

Any comments will be appreciated.

It depends.

You could train speed (ie HIIT) and two training sessions would be more
effective for this purpose. But it may be necessary to train endurance
beyond that.

If you're doing HIIT, you probably shouldn't be doing more than 1 session in
the same day, so 1 session would still be desirable regardless of the
duration.

The only case I can think of for doing 2 sessions would be an endurance athlete
with a fairly high training load. For example, a runner on 70mpw may do
something like this:

Mon AM: slow 5 miles PM: intervals 5 miles (including warmup/cooldown)
Tues: moderately long run 12 miles
Wed: AM: slow 5 miles PM: Tempo run 5 miles total
Thurs: AM: slow 5 miles PM: slow 5 miles
Fri: rest
Sat: AM: slow 6 miles PM: slow 6 miles
Sun: long run 16 miles

Cheers,
--
Donovan Rebbechi
http://pegasus.rutgers.edu/~elflord/