Have you exercised and felt really good afterwards? You should actually feel good after every exercise you do.
Back about 30 years ago the running world coined a phrase; "runner's high". It was an endorphin release in the brain that happened after several miles of running. It was a neurochemical release caused by the effects of running.
This "runner's high" may be one factor that helps you determine if the exercise you're doing is doing any good, no matter the exericse.
It is the intensity of the exercise that brings about these physiological changes.
They can come from high intense workouts of lifting heavy weights with maximum effort or running the fastest you possibly can.
But you don't have to do either of these. You can do the same in a very short time by High Intensity Interval Training (HIIT). This type of exercise is fairly new in the last 20 years but there is much research that shows this type of exercise is even better than what you may be doing if you're not already doing HIIT.
From The Bridge:
"High-Intensity Interval Training is an intense bout of exercise preceded and followed by a slower variant of the same or separate exercise. Though initially confusing, here is something that will help you understand the concept of HIIT better, and possibly implement it into your workouts. That is the exact aim for HIIT workouts, they minimize time and burn calories in a short intense workout that will leave you huffing. HIIT workouts are essential for those who wish to engage in cardio without losing muscle and decreasing body fat. According to a research study, sprint interval training which consists of sprinting at higher intensities showed better fat loss results than the traditional endurance activities of walking and jogging."
The main key is to use the most muscles through their complete range of motion under some resistance. You will get to intensity quickly.
What is the very best way to do HIIT? The Myoride exercise machine because you are using the most muscles all at one time under resistance so that you reach exhaustion in less than 60 seconds.
If you're not feeling good after your workout you need to try our machine a few times and notice the changes in blood flow, muscle toning, range of motion that you have never noticed before.