logologo

Popular Boards

1 Mentions
Yogesh N.V. Reddy, Mahesh Anantha Narayanan, Masaru Obokata | Journal of Cardiac Failure | (2019)
Primary Link DOI Openalex Full text (OA)

Key Takeaways

Sample Definition And Size

Nine studies involving 110 obese patients without clinically overt heart failure were included in the meta-analysis. Six studies tested dietary interventions, and three tested bariatric surgery.

Study Type

Systematic review and meta-analysis of observational studies.

Conflicts Of Interest

The authors declared no conflicts of interest.

Results Summary

Therapeutic weight loss in obese patients without heart failure was associated with significant reductions in heart rate (-9 beats/min, 95% CI: -12 to -6; p < 0.001), mean arterial pressure (-7 mm Hg, 95% CI: -11 to -3; p < 0.001), and resting oxygen consumption (-85 ml/min, 95% CI: -111 to -60; p < 0.001). Central cardiac hemodynamics improved, with reductions in pulmonary capillary wedge pressure (-3 mm Hg, 95% CI: -5 to -1; p < 0.001) and mean pulmonary artery pressure (-5 mm Hg, 95% CI: -8 to -2; p = 0.001). Exercise hemodynamics showed a significant reduction in exercise pulmonary artery pressure (p = 0.02).

Abstract

No abstract available

Referenced In

William Fan
9 months ago
William Fan's 2025 91 Day Weight Loss Challenge

Week 8: Resting and resting heart rate

  • Weight (7d avg): 186.9lbs/84.8kg, from peak -12.8lbs/-5.8kg

  • RHR (7d avg): 59.4bpm

  • Calories In (7d avg): 1686kcal

  • Exercise (7d avg): 500kcal

  • Net Deficit (total): -2300kcal

  • 2x5x500m row: 1:51.0, 1:49.6

Notes:

I saw a continued steady decline in my weight 2 weeks after my sleep apnea surgery. Recovery was slow but continual. Though I had hoped to be mostly recovered 2 weeks in, I was just starting to be able to eat normally again throughout the week. My decreased diet meant exercising was difficult. But as soon as I was able to increase my calories I was able get back to my gym routine.

One additional goal I had for this weight loss challenge was getting my resting heart rate down closer to where I was a few years prior, in the low 50s. As I entered my mid thirties, my RHR seemed to go up 1 bpm every year. It's difficult to say what caused this but I was very interested in seeing what I could do to get it back down.

Anecdotally, the more weight I lost and more exercise I got, the better my RHR. However, getting sick or recovering from surgery caused my RHR to rise within a few days. There's 3 categories I'm interested in when considering RHR impacts: weight loss, exercise, and illness.

Weight Loss

A meta-analysis from 2019 found an associated -9bpm with large median weight loss of 43kg. This ranged from 20% to 30% weight loss. In a 1 year controlled trial , RHR decreased by 4bpm with a 5-10% decrease in weight. There are several other confounding factors including diet and exercise that could also impact RHR, but generally weight loss seems to have a consistent effect.

Exercise

Easily the most well studied factor for improving RHR, a large systematic review and meta-analysis published in 2018 showed -5.2bpm from all types of sports, -6.0bpm from endurance training, and -2.5bpm from strength training. Notably, studies showed -7.2bpm from yoga specifically. These adaptations took several weeks to see drops, but I see impacts from my Fitbit within a few days of high aerobic activity.

Illness

I always see a spike in my RHR when I get sick and it can be quite discouraging. I try to keep my spirits up by reminding myself its temporary. A national US study looking at the relationship between body temperature and heart rate found a HR increase of 7bpm for every increase in T of 1.0°C or 1 .8°F. Diseases like COVID-19 saw increases of 1.8% for females and 3.4% for males on initial onset.

Read Full Post
1