Health by Jay

Exercise

Move: walking after meals, and lifting something heavy

The chart says 30 minutes of mild walking. The evidence says: walk after you eat, add strength training, and South Asians probably need more than the standard 150 minutes.

Compiled by Jayakanthan, Richmond, Virginia

Last reviewed against sources: October 25, 2026

On this page
  1. 1How much, of what
  2. 2The single most useful habit: walk after you eat
  3. 3Strength training
  4. 4South Asians may need more
  5. 5Exercise safety with diet changes
  6. 6Sleep counts too
For my family only

This site is curated for my own family members. It is not a recommendation or a diet plan for anyone else. Do not change your diet, start fasting, or change any medicine without your own doctor's advice. We are not responsible for any consequences of following this information without proper medical supervision.

Read this first: This page is education, not a treatment plan. If you take insulin, a sulfonylurea (glipizide, glimepiride, gliclazide), an SGLT2 inhibitor (Jardiance, Farxiga, Invokana), blood pressure pills, warfarin or lithium, or if you are pregnant, breastfeeding, under 18, have kidney disease or a history of an eating disorder, do not start a low-carb diet or fasting without your doctor.
The short version
  • Structured exercise lowers HbA1c by about 0.7 points in type 2 diabetes A[1].
  • A 10-minute walk after each meal beat one 30-minute walk a day for after-meal blood sugar B[2].
  • The chart leaves out strength training. WHO recommends it at least 2 days a week A[3].
  • South Asians may need about 230 to 270 minutes a week to get the metabolic benefit Europeans get from 150 C[4,5].

1How much, of what#

The World Health Organization's 2020 guidelines, built on systematic reviews, ask adults for[3]:

  • 150 to 300 minutes a week of moderate activity (brisk walking where you can talk but not sing), or 75 to 150 minutes of vigorous activity.
  • Muscle-strengthening activity on 2 or more days a week, working the major muscle groups.
  • Less sitting, broken up often. Some activity is better than none; more is better.

The American College of Sports Medicine applies the same targets to people with type 2 diabetes and adds that timing matters and that long sitting should be broken up[6].

AExercise lowers HbA1c.

A JAMA meta-analysis of 47 trials (8,538 people with type 2 diabetes) found structured exercise lowered HbA1c by 0.67 points. Aerobic exercise alone: 0.73; strength training alone: 0.57; both together: 0.51. More than 150 minutes a week lowered it by 0.89, against 0.36 for 150 or less. Advice to be active, without a structured program, only helped when paired with diet advice[1].

2The single most useful habit: walk after you eat#

BTen minutes after each meal beats thirty minutes once a day.

In a New Zealand crossover trial, 41 people with type 2 diabetes walked either 10 minutes after each main meal or 30 minutes once a day, two weeks each. The after-meal walks lowered post-meal blood sugar by 12% overall and by 22% after dinner, the biggest and usually the most carb-heavy meal[2].

BShort walking breaks during long sitting lower glucose and insulin.

A meta-analysis of seven trials found light walking breaks during prolonged sitting lowered after-meal glucose and insulin; standing breaks helped glucose less[7]. For desk workers: stand up and walk 2 to 5 minutes every 30 to 60 minutes.

C"Exercise snacks" before meals.

In a small study of 9 people, six 1-minute bursts of brisk incline walking before meals lowered 24-hour glucose more than one 30-minute walk[8]. Promising, tiny.

For a Tamil household this is easy to start: after dinner, a 10 to 15 minute walk around the block or in the community, instead of sitting down straight to TV. It is also the advice a nutritionist gave BBC Tamil readers worried about Paleo[9].

3Strength training#

Muscle is where most glucose goes after a meal. The trials above show strength training lowers HbA1c on its own[1], and diet-only weight loss costs muscle: men on a Paleo diet who did not exercise lost 2.6 kg of lean mass in 12 weeks[10], and the 16:8 fasting trial TREAT also lost lean mass[11].

A simple start, two or three times a week, no gym needed:

  1. Sit-to-stand from a chair (squats): 3 sets of 8 to 12.
  2. Wall or counter push-ups: 3 sets of 8 to 12.
  3. Rows with a resistance band or a filled backpack: 3 sets of 10.
  4. Calf raises holding the kitchen counter: 3 sets of 15.
  5. Glute bridges on the floor: 3 sets of 12.

Make it harder every couple of weeks (more reps, slower, a heavier bag). If you have heart disease, uncontrolled blood pressure, retinopathy or joint problems, get your doctor's clearance first D.

4South Asians may need more#

CAbout 230 to 270 minutes a week to match a European's benefit at 150.

A Scottish study found South Asian men needed about 266 minutes of moderate activity a week to reach the same blood sugar and insulin profile that European men had at 150[4]. A follow-up including women put it at about 232 minutes[5]. Both are cross-sectional and small, so treat the exact numbers loosely. The direction is consistent with South Asians developing diabetes at lower weights.

Practical target: a 10 to 15 minute walk after every meal (about 3.5 to 5 hours a week if you do all three), plus two strength sessions. If you only manage the after-dinner walk, add two or three 30 to 45 minute brisk walks or bike rides. Either way most people reach 230 minutes or more without a gym.

5Exercise safety with diet changes#

  • If you take insulin or a sulfonylurea, exercise, carb cutting and fasting all lower blood sugar. Together they add up. Check your glucose before and after exercise for the first few weeks, and carry a fast-acting sugar D[12].
  • Exercising late in a long fast is when people feel faint. Exercise after a meal, not at hour 18 of a fast.
  • Stop and get help for chest pain, unusual breathlessness, or dizziness that does not settle.

6Sleep counts too#

BShort sleep makes your body worse at handling sugar.

Trials that restricted sleep found insulin sensitivity fell, in a meta-analysis of randomized studies[13]. In a classic experiment, six nights of 4 hours in bed lowered healthy young men's glucose tolerance[14]. Aim for 7 to 8 hours; an earlier dinner (see fasting) helps both.

Sources on this page

Every source below was checked against its PubMed, DOI or publisher page. Grades and how we use them: evidence grades.

  1. Umpierre D, Ribeiro PA, Kramer CK, et al. (2011). Physical activity advice only or structured exercise training and association with HbA1c levels in type 2 diabetes: a systematic review and meta-analysis.. JAMA 305(17):1790-1799. PMID 21540423 · doi:10.1001/jama.2011.576 - Meta-analysis, 47 RCTs, 8,538 people
  2. Reynolds AN, Mann JI, Williams S, et al. (2016). Advice to walk after meals is more effective for lowering postprandial glycaemia in type 2 diabetes mellitus than advice that does not specify timing: a randomised crossover study.. Diabetologia 59(12):2572-2578. PMID 27747394 · doi:10.1007/s00125-016-4085-2 - Randomized crossover, n=41, type 2 diabetes
  3. Bull FC, Al-Ansari SS, Biddle S, et al. (2020). World Health Organization 2020 guidelines on physical activity and sedentary behaviour.. Br J Sports Med 54(24):1451-1462. PMID 33239350 · doi:10.1136/bjsports-2020-102955 - WHO 2020 guidelines
  4. Celis-Morales CA, Ghouri N, Bailey ME, et al. (2013). Should physical activity recommendations be ethnicity-specific? Evidence from a cross-sectional study of South Asian and European men.. PLoS One 8(12):e82568. PMID 24349313 · doi:10.1371/journal.pone.0082568 - Cross-sectional, men only
  5. Iliodromiti S, Ghouri N, Celis-Morales CA, et al. (2016). Should Physical Activity Recommendations for South Asian Adults Be Ethnicity-Specific? Evidence from a Cross-Sectional Study of South Asian and White European Men and Women.. PLoS One 11(8):e0160024. PMID 27529339 · doi:10.1371/journal.pone.0160024 - Cross-sectional, men and women
  6. Kanaley JA, Colberg SR, Corcoran MH, et al. (2022). Exercise/Physical Activity in Individuals with Type 2 Diabetes: A Consensus Statement from the American College of Sports Medicine.. Med Sci Sports Exerc 54(2):353-368. PMID 35029593 · doi:10.1249/MSS.0000000000002800 - ACSM consensus statement, type 2 diabetes
  7. Buffey AJ, Herring MP, Langley CK, et al. (2022). The Acute Effects of Interrupting Prolonged Sitting Time in Adults with Standing and Light-Intensity Walking on Biomarkers of Cardiometabolic Health in Adults: A Systematic Review and Meta-analysis.. Sports Med 52(8):1765-1787. PMID 35147898 · doi:10.1007/s40279-022-01649-4 - Meta-analysis of acute crossover trials
  8. Francois ME, Baldi JC, Manning PJ, et al. (2014). 'Exercise snacks' before meals: a novel strategy to improve glycaemic control in individuals with insulin resistance.. Diabetologia 57(7):1437-1445. PMID 24817675 · doi:10.1007/s00125-014-3244-6 - Small crossover, n=9
  9. K. Subagunam (2022). பேலியோ உணவு முறையை பின்பற்றுவதால் நீரிழிவு ஏற்படுமா? (Can following the Paleo diet cause diabetes?). BBC Tamil, 1 November 2022. Link - News
  10. Otten J, Stomby A, Waling M, et al. (2017). Benefits of a Paleolithic diet with and without supervised exercise on fat mass, insulin sensitivity, and glycemic control: a randomized controlled trial in individuals with type 2 diabetes.. Diabetes Metab Res Rev 33(1). PMID 27235022 · doi:10.1002/dmrr.2828 - RCT, n=32, both arms Paleo, exercise vs advice
  11. Lowe DA, Wu N, Rohdin-Bibby L, et al. (2020). Effects of Time-Restricted Eating on Weight Loss and Other Metabolic Parameters in Women and Men With Overweight and Obesity: The TREAT Randomized Clinical Trial.. JAMA Intern Med 180(11):1491-1499. PMID 32986097 · doi:10.1001/jamainternmed.2020.4153 - TREAT RCT, n=116, 12 weeks, 16:8 without other advice
  12. Murdoch C, Unwin D, Cavan D, et al. (2019). Adapting diabetes medication for low carbohydrate management of type 2 diabetes: a practical guide.. Br J Gen Pract 69(684):360-361. PMID 31249097 · doi:10.3399/bjgp19X704525 - Practical guide for GPs; practice-based, not trial evidence
  13. Zhu B, Shi C, Park CG, et al. (2019). Effects of sleep restriction on metabolism-related parameters in healthy adults: A comprehensive review and meta-analysis of randomized controlled trials.. Sleep Med Rev 45:18-30. PMID 30870662 · doi:10.1016/j.smrv.2019.02.002 - Meta-analysis of sleep restriction trials
  14. Spiegel K, Leproult R, Van Cauter E (1999). Impact of sleep debt on metabolic and endocrine function.. Lancet 354(9188):1435-1439. PMID 10543671 · doi:10.1016/S0140-6736(99)01376-8 - Small physiology study