Hi Sue,
Short intense exercise or interval training is indeed a better option than long,steady cardio for health and weight loss.
Long cardio sessions have an initial effect on fat loss but very quickly the body adapts to the stress and will become more fuel efficient so you use less fuel to do the same distance.
Long cardio sessions also release a stress hormone called Cortisol...it is highly Catabolic which means it will eat up your hard earned muscle tissue...seeing as muscle tissue uses up energy to stay alive,this is not good as you are literally decreasing your metabolic furnace.
Interval training releases anabolic hormones which are muscle builders.
The best way I have found to build muscle and lose fat is interval training using weights...example: 5 exercises of 8-12 reps with no rest in between sets...rest no more than 90 secs and repeat up to five times...use free weights or body weight.
The cardio version of this is all out for 30 secs and rest for 30 secs...do for 20 mins.
This will raise your metabolism,burn fat and promote muscle growth...if you doubt it just look at a Sprinter's body v a Marathon runner's...sprinters do short intense workouts and lots of weights...marathon runners do lots of steady distance runs.
In fact my little pic at the top of the page shows me doing an interval session with kettlebells...go to http://www.robinallan.com/blog.html and you can see my results of training this way.
Robin
Robin Allan
Chek Practitioner
Natural Health Coach
http://www.robinallan.com
robin_allan@hotmail.com
07967-366470