When It Comes to Exercise, Different People Get Different Results
Are you getting any results with your exercise program? Here's What To Do That Is Science Backed.
There is no one-size-fits-all training approach. Two people doing the same workout can produce very different results. A person can work hard in the gym for months without much progress while their training partner gets stronger with each session.
Are you getting any results with your exercise program? Here's What To Do That Is Science Backed.
There is no one-size-fits-all training approach. Two people doing the same workout can produce very different results. A person can work hard in the gym for months without much progress while their training partner gets stronger with each session.
In exercise research1, there is a term used to describe someone who does not get the expected results from a certain type of exercise: non-responders. In study after study, some participants improve greatly and others do not improve at all, even when using the same program
It can be frustrating for those who try hard and don't get the results they want, but we can learn from research in this area to ensure everyone gets the benefits of exercising.
Here is an example of how much variation there is between individuals in response to a particular exercise program.
One hundred and twenty-one adults took part in a 24-week hiking program and exercised five times a week. Before the start of the study2, they were randomly divided into three groups:
- A low-intensity, low-intensity group that walked an average of 31 minutes per session at an intensity that would be considered moderate according to training guidelines. I call this the low group.
- A high-intensity, low-intensity group that ran at the same intensity in each session but about twice as long (58 minutes average) as the first group. I call this the middle group.
- A high intensity group that walked at high intensity for approximately 40 minutes each session. I call this the high group.
Cardio fitness was measured several times during the study. After six months, each group has developed as follows:
- In the lower group, 62% of the participants improved their fitness.
- In the middle group, 82% improved their fitness.
- In the high group, 100% of the participants improved their fitness.
On closer inspection, there is a wide range of fitness changes within the groups as well.
These graphs show how each person's fitness changed after completing the program. Each bar represents a person's answer. You can see that some people have improved a lot, others have improved a little, and some have lost weight.
- In the low group, responses ranged from an 8% decrease in fitness to a 30% improvement.
- The middle group ranged from a 10% loss of fitness to a 43% improvement.
- In the high group, the least responsive participant improved by only 7%, while the most responsive participant improved a whopping 118%.
Remember that within each group, these people did the same exercise program, but their results were very different.
This study3 focused on cardiovascular fitness cardiovascular exercise, but it does so in other types of exercise studies, including interval training and strength training.
For example, in a strength training study4, the same 12 week program resulted in changes in strength ranging from no improvement in one person to a 250% increase in another. There were also significant differences in muscle growth between individuals, with one person decreasing their muscle size by 2% while the most responsive person increasing their muscle size by 59%.
This effect5 has also been observed in nutritional science, with people following the same diet losing weight to very different degrees, and sometimes even gaining weight.
The reasons for these differences are not obvious. Of course, factors such as sleep, stress, diet, and occasional physical activity can all affect how someone responds to an exercise program.
Researchers try to take these things out of the equation by asking participants to follow a standardized diet or wear activity trackers when they are not in the lab, but there is no way to fully control them.
Genetic factors certainly play a role, too, with research6 showing that around 50% of response to cardiovascular exercise is due to genetic differences.
What can we learn from this?
If you're one of the lucky ones who responds well to a particular exercise program, that's great! If not, don't worry. While these results may seem daunting at first, there is good news. If we dig further into the research, it seems that there are no real non-responders to train on. Everyone is getting better somehow.
If you're not getting the results you want from your exercise program, here are some things to keep in mind.
When it comes to training, consistency is key
Probably the most effective program for you is the one that you do on a regular basis.
In the walking study, the researchers reported the fitness improvements only in those who attended at least 90% of the workouts in the six months.
Not everyone who completed the study managed to get 90% of the sessions. As the researchers went back and included those who attended at least 70% of the sessions, the percentage of people who improved their fitness dropped by about 4% in the low and middle groups and by about 12% in the high groups.
I would say 70% is still pretty much constant. This means that these people did an average of 3.5 workouts per week, every week, for six months. Most of them improved their fitness. However, more consistency is better. People who attended 4.5 sessions per week (90% of total sessions) improved even better.
Consistency is probably the most critical factor in getting the benefits of training. Do something, anything every week. When struggling with consistency, focus on setting yourself small, achievable goals and developing sustainable exercise habits before going into the details of the program you are doing.
Have the other parts of a healthy lifestyle in place
Get enough sleep, drink enough water, eat plenty of nutritious foods, get exercise as often as possible throughout the day, and manage your stress levels.
If you don't have these things well under control, you won't know if it's the exercise program you're not responding to or if something else in your lifestyle is holding you back.
If one method doesn't work, try another
Perhaps you have healthy lifestyle habits and have exercised consistently for several months with lackluster results. What should i do?
Try to increase the intensity or duration of each session. If we look again at the walking study, some participants did not improve their fitness after six months of constant, moderately intense exercise.
Nonetheless, everyone who trained at a higher intensity improved. Even at moderate intensity, people who increased their volume (who doubled the time spent in each session) were more likely to see improvements.
You could also do more sessions over the week. In another study7, the researchers found that not everyone improved their fitness if they cycled for 60 minutes once or twice a week for six weeks.
In that study, there were also people doing the same cycling workouts 4-5 times a week and all of these people responded. After that, people who had not improved their fitness repeated the program. This time they added two more sessions a week and everyone improved.
You could try a different type of exercise. In one study, participants completed a three-week endurance cycling program and a three-week interval training program in random order
They found that some people did not improve their fitness with one program, but did improve when they did the other program.
When it comes to weight training, a number of set and rep protocols9 appear to be effective for different people. For example, if your goal is to gain muscle mass and the traditional four sets of 8-12 reps haven't worked for you, your body may be more responsive to heavier weights and fewer reps, or lighter weights and more reps.
Treat your training as a science experiment
Exercise offers a number of different and important benefits. It can improve your body composition, reduce your risk for many diseases, improve your performance, brain function, and mood, and much more.
Even if you don't see the specific results you expect, You will improve your health and fitness in some ways through consistent exercise.
For example, the researchers had participants complete a year-long cardio program in which they exercised for 45 minutes three days a week. Four different types of cardio fitness were measured at the end of the program.
Here, too, there was enormous variability in the individual answers. And some of the participants did not improve on all four points. However, each person in the study showed an improvement in at least one aspect of their fitness
Perhaps you are focusing on the wrong level of results, or perhaps you are not tracking your progress closely enough to see what you are achieving. If you don't keep track of what you are doing and how you are moving forward, you have no idea whether or not your program is working for you.
Make a list of some of the benefits of exercise that are important to you and keep track of each one.
- If you are interested in improving your health, you can keep an eye on your resting heart rate, blood pressure, or blood sugar.
- For body composition, you can track your body fat percentage or your measurements.
- If fitness and performance are important to you, track your time for a distance, the weight you lift for each exercise, or the number of pushups or pullups you can do.
- For the more subtle (but equally important) benefits of exercise like mood, stress relief, focus, frequency of pain, or energy levels, use a simple 1-10 scale to measure how you are feeling each day.
Record this information in a notebook or use a spreadsheet or your phone. Follow a particular program for a few weeks or months, assessing how you are responding, and making changes if necessary.
You will likely be pleasantly surprised by the many ways you can improve your body and life with exercise.
Your blood pressure may not have gone down, but your mood may have improved and your 5 km time may have improved. You may not have lost weight, but you gained strength, gained energy, and began to sleep better.
These improvements can motivate you to keep going, and if you do, you will likely find a training method that works best for you.
Do not compare yourself to others
It should be clear by now that just because your friend has had great results on a particular program, won't mean you will. Focus on your progress, not on that of others.
The bottom line
If you don't see the results you want, keep trying. If you still don't see results, try something else. Finally, remember that the science is clear. Everyone reacts.
If you stick to it consistently, you will gain meaningful benefits.
References:
1. Pickering, Craig, and John Kiely. "Are there non-responders to sport – and if so, what should we do about it?" Sports medicine 49, No. 1 (2019) :: 1-7.
2. Ross, Robert, Louise de Lannoy, and Paula J. Stotz. "Separate effects of intensity and training volume on the individual cardiorespiratory fitness response." Mayo Clinic, Proceedings 90, No. 11, (2015): 1506-1514.
3. Gurd, Brendon J., Matthew D. Giles, Jacob T. Bonafiglia, James P. Raleigh, John C. Boyd, Jasmin K. Ma, Jason GE Zelt, and Trisha D. Scribbans. "Incidence of Non-Responses and Individual Response Patterns After Sprint Interval Training." Applied Physiology, Nutrition and Metabolism 41, No. 3 (2016): 229-234.
4. Hubal, Monica J., Heather Gordish-Dressman, Paul D. Thompson, Thomas B. Price, Eric P. Hoffman, Theodore J. Angelopoulos, Paul M. Gordon et al. "Variability in muscle size and strength gain after one-sided resistance training." Medicine & Science in Sport & Exercise 37, No. 6 (2005): 964-972.
5. Gardner, Christopher D., John F. Trepanowski, Liana C. Del Gobbo, Michelle E. Hauser, Joseph Rigdon, John PA Ioannidis, Manisha Desai, and Abby C. King. "Effect of a Low-Fat vs. Low-Carbohydrate Diet on 12 Month Weight Loss in Obese Adults and Association with Genotype Pattern or Insulin Secretion: The DIETFITS Randomized Clinical Trial." Jama, 319, no. 7 (2018): 667-679.
6. Ross, Robert, Bret H. Goodpaster, Lauren G. Koch, Mark A. Sarzynski, Wendy M. Kohrt, Neil M. Johannsen, James S. Skinner et al. "Precision Exercise Medicine: Understanding the Variability of Exercise Response." British Journal of Sports Medicine 53, No. 18 (2019): 1141-1153.
7. Montero, David and Carsten Lundby. "The myth of non-response to training is refuted: 'Non-responders' react to a higher training dose." The Journal of Physiology 595, No. 11 (2017): 3377-3387.
8. Bonafiglia, Jacob T., Mario P. Rotundo, Jonathan P. Whittall, Trisha D. Scribbans, Ryan B. Graham, and Brendon J. Gurd. "Inter-Individual Variability in Adaptive Responses to Endurance and Sprint Interval Training: A Randomized Crossover Study." PloS one 11, no. 12, (2016).
9. Beaven, C. Martyn, Christian J. Cook, and Nicholas D. Gill. "Significant strength gains in rugby players following specific resistance exercise protocols based on individual testosterone responses in saliva." The Journal of Strength & Conditioning Research 22, No. 2 (2008): 419-425.
10. Scharhag-Rosenberger, Friederike, Susanne Walitzek, Wilfried Kindermann and Tim Meyer. "Differences in Adaptation to 1 Year of Aerobic Endurance Training: Individual Patterns of Non-Response." Scandinavian Journal of Medicine & Science in Sports 22, No. 1 (2012): 113-118.