Hi - I emailed Tom and here's the response received on the length of the workouts:
"Hi the workouts range from 30 - 45 minutes.If you want a longer wokout. i usually combine one of the workouts with another....for example...weightlose with abs is a good combo. i also want you to look at the "basis" for my times....i really believe this to be true...i am going to be 50 years old in August and i have trained this way most of my life....please let me know what you think....tom
? FITNESS, MARCH 2002 - Laval University in Canada found that exercisers who added several ?speed intervals? to their workouts lost 9 TIMES more fat over a 15 weeks than those who worked out longer but at an easier, steadier pace.
? The journal of physiology- a 20 minute interval workout netted the same ?benefits? as a 90 ? 120 minute workout done at ?steady pace?. Martin Gibala, associate professor of kinesiology at Canada?s McMaster University:
? A study in the Journal of Physiology shows that a half hour of exercise where you alternate one minute of fast or increased speed with one minute of slower speeds or pauses can improve your fitness level as much as an hour and a half of moderate exercise.
? MEN?S HEALTH, SPRING 2002 ? Short, intense exercise sessions produce 9 TIMES more fat lose than longer, slower exercise sessions.
? REDBOOK MAGAZINE
http://magazines.ivillage.com/redbook/dh/diet/articles/0,,284479_577038-4,00.html
"Studies have shown that people who do interval training twice a week [in addition to cardio] lose twice as much weight as those who do just a regular cardio workout," says obesity specialist Aronne."
Just thought I'd pass this on for more information. Not sure if I will get them or not, but wanted to pass this on.
Have a great day