Physical Fitness Stack Exchange is a question and answer site for physical fitness professionals, athletes, trainers, and those providing health-related needs. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I use one type of lateral trainer for thighs for cardio. The gym I go to have two such machines. After each minute or so, one of the machines shows me: 'you've to maintain 280 spm speed' (what's spm in the context of speed, by the way?) and shows a certain amount (say x) of calories being burnt per minute. However, I almost never (unless I push myself extremely hard), can attain 280 spm speed, I stick around 140 spm speed normally, which is just half.

Here's my question: since I'm sticking to a speed which is merely half of 280 spm, the recommended speed, does it mean I'm actually burning half of the calories shown? That is, is it really x/2 calories I'm burning per minute when the machine shows I'm burning x calories per minute?

And what is spm in the context of speed?

Thanks in advance!

share|improve this question

SPM stands for "Strides per minute". And, within the limits of the exercise machine's approximation abilities, it adjusts for what your actual effort is. If it has a pulse-rate monitor, that's actually going to be more useful to you to judge burning of calories, whether you're in that "target zone" for your age and weight.

share|improve this answer
Thanks Sean, but if it keeps saying 'maintain 280 spm' and I keep using the machine at 140 spm, and still the machine shows that I burn 20 calories per minute (say), in that case am I burning approximatelyly 10 calories per minute? – Mathmath Jun 1 '14 at 19:27

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.