For the last few weeks, I changed my workout time to the early morning, 5:30 AM. On day one of the new exercise programs, I felt all workout routines feel much more challenging than when I do them at lunchtime or early evening.
Since I did not have a good sleep that day, I thought I was just tired. The following day, I did a cardio, BODYATTACK. I felt so pitiful that it was near impossible to bring my heart rate above 140 in the early morning than later in the day. I had 8.5 hours of sleep with a sleep score of 90 the day. So, it was nothing to do with the duration or quality of the sleep. I was curious about this phenomenon, so I continued the morning exercises every single day of the rest of the week and monitored my heart rates. I made changes to the intended exercise, but I wanted to check them all. So, I tried30 minutes BODYCOMBAT (Kickboxing), BODYATTACK (Bootcamp), BODYPUMP (Strength exercise), and GRIT (HIIT).
When I wake up, my heart rate is about 65. Usually, I move around the house for 15-20 minutes before exercising. The interesting part of this morning exercise was that I still felt as if I exercised at 90% of my max heart rate at the actual heart rate is just 135-140. GRIT was the worst one, and I had to give up at 17 minutes. Consequently, my calories output was lower by 100 calories for morning cardio exercises.
After one week of the observation, I made the following hypotheses.
The morning exercise feel harder because
- My starting heart rate is lower in the morning. I suspect that that is something to do with my heart rate being so low in the early morning. My resting heart rate is 63-65, and it can be a lot of stress to push it up to almost double.
- Since I am on intermittent fasting, my body does not have energy in the morning. I exercised at lunch during the fasting before. I have no problem reaching 90% of my max heart. Thus, the 2nd hypothesis is incorrect.
- My muscles are not ready for a workout. I felt this when I was doing BODYPUMP (Strength Exercise) and GRIT (HIIT). I had difficulties keep my squats low.
I suspect that that is something to do with lower heart rates and stiffer muscles. Since my starting heart rate is so low, it can be a lot of stress to push it up to almost double in a short time. Interesting, right? I put my researcher’s hat on, and I investigated some.
If the primary objective is to have the best performance, the morning is not the right time to exercise.
As I suspected, the primary reason is the lower max heart rates in the morning. Thomas Reilly and his colleagues at the Research Institute for Sport and Exercise Sciences at Liverpool John Moore University (as cited in the New York Times, Dec 9, 2009) found that our maximum heart rate is lower in the morning. However, the perception of how hard they were working was the same for morning and evening. Our body has a circadian rhythm that controls the hormones in our body to have a regular sleep-wake schedule. Our blood pressure, metabolism, energy level, and heart rates are lower in the early morning.
He and his colleagues also mentioned that our bodies are not as well prepared to exercise in the morning because our muscles tend to be less flexible. The athlete’s best performance is set in the late afternoon or the early evening (as cited in the New York Times, Dec 9, 2009).
Is morning exercise being all that bad? Despite my findings, there are some benefits to exercising in the morning.
Dietary Choices for the day
The people who work out in the morning tend to make healthier food choices for the day. After observing 2,680 young adults for 15-week cardio exercise in the morning, the young adults who work out in the morning tend to pursue healthier dietary preferences and habits (Joo, Willamson, Vazquez, Fernandez, and Bray, 2018). The study did not particularly seek to find the best time to exercise; however, the morning exercise motivated them to make healthier eating throughout the day. Since I started the training in the morning, I feel it has gotten easier to regulate my foods intake for the day.
More energy and higher productivity
I felt dreadful during my morning workout; however, I felt more energy when I did the morning exercises. My heart rate is higher after the training. My body is warmer. I even felt more alert and focused on my work. I usually do 1 hour of continuing education in the morning. I noticed my focus was higher after the morning exercise. The best part was I felt so good the whole day because I did a workout in the morning. So, I was more productive.
The choice is all about what you want to accomplish and your preference.
I prefer to work out in the morning because I must go to bed early at night. I have never liked to wake up early; however, I hated the morning traffic even more than waking early in the morning. For the last year, I have been working remotely. My work would like me to go to the office three times a week soon. So, I decided to adjust my schedule. Furthermore, I enjoyed the higher productivity due to the morning workout.
Discussion
The following week, I found out few things to minimize the loss. For example, a light intensity cardio before the strength exercise can help with the workout. BODYPUMP also has a warmup. After a short, low-intensity cardio session, my body is more prepared to do more strenuous strength training.
The Starting Exercise Program
| MON | TUE | WED | THUR | FRI | SAT | SUN | |
| Morning | Rest | BODYPUMP | Any cardio | BODYPUMP | Any cardio | BODYPUMP | BODYFLOW |
| Evening | HIIT | HIIT | HIIT |
For one week, I did GRIT, BODYPUMP, BODYCOMBAT, BODYATTACK, and BODYSTEP all six mornings to satisfy my curiosity. After some investigation, I modified it a little bit. I kept a short GRIT (HIIT) exercise either on my lunch (when I was working remotely) or in the early evening (if I go into the office as I plan). The addition of HIIT exercises changed made a significant difference to my body weight. I started to lose weight again without losing my muscle mass.
I added a 5–10-minute low-intensity cardio before BODYPUMP so that my strength training has the intended effectiveness. This change is helping my strength workout.
Despite the lower-calorie output, I still prefer some cardio in the morning because of the productivity gain. So, I added another Cardio session on one of the weekends to accommodate the loss of 100 calories.
A New Modified Exercise Program
| MON | TUE | WED | THUR | FRI | SAT | SUN | |
| Morning | Rest | BODYPUMP* | Cardio | BODYPUMP* | Cardio | BODYPUMP* | BODYFLOW |
| Evening | GRIT – Short | GRIT – Short | GRIT – Short | Cardio |
*A 5–10-minute light cardio before BODYPUMP
** GRIT – only short version (15-18 minutes)
What’s next
Initially, I thought of doing GRIT even on a Cardio day instead; however, I decided to add another cardio day on the weekend. I am finding out too much GRIT can cause mitochondria dysfunctions due to the stress caused by its strenuousness. You can reduce the damage by taking mitochondrial regulators and protector nutrients such as 5 grams of Leucine, 5 grams of creatine monohydrate, and 2.5 grams of betaine (Blechman, April 12, 2021). He is citing a lot of journals, so that I will check them out. For now, I am going to keep my new modified exercise program without taking these mitochondrial regulators and protector nutrients.
References
Blechman, S. (April 12, 2021). New Study Says High-Intensity Interval Training (HIIT) Can Cause Mitochondrial Dysfunction.https://advancedmolecularlabs.com/blogs/news/new-study-says-high-intensity-interval-training-hiit-can-cause-mitochondrial-dysfunction
Joo, J., Williamson, S. A., Vazquez, A. I., Fernandez, J. R., & Bray, M. S. (2019). The influence of 15-week exercise training on dietary patterns among young adults. International Journal of Obesity, 43(9), 1681–1690. https://doi.org/10.1038/s41366-018-0299-3
New York Times. (December 9, 2009). Ready to Exercise? Check Your Watch.https://www.nytimes.com/2009/12/10/health/nutrition/10best.html