5 Things Destroying Your Metabolism That Aren't Sugar

Summary

Dr. Tessa Damm argues that metabolic health can be affected by factors beyond sugar. She focuses on five often-overlooked issues:

1. Poor or irregular sleep

• The video links insufficient sleep with reduced insulin sensitivity and potentially greater muscle loss during weight loss.
• Aim for at least seven hours when possible, and try to keep bedtime and wake time within about 30 minutes of the same time each day, including weekends.
• Treat sleep as part of recovery, rather than something to sacrifice for chores or other demands.

2. Chronic stress

• Cortisol is a normal stress-response hormone, but prolonged stress may affect glucose regulation, appetite, sleep, and recovery.
• Consider the total stress load from work, inadequate sleep, missed meals, and intense exercise—not just emotional stress.
• Prioritize recovery, adequate food and sleep, and opportunities to wind down. The speaker says some women may find breakfast soon after waking helpful, particularly if they feel low on energy.
• The speaker describes continuous glucose monitors as one way to observe how different daily factors may affect an individual’s glucose patterns.

3. Exercising harder without enough recovery

• Increasing cardio or workout intensity is not always the answer; training should match a person’s fitness, nutrition, and recovery.
• The speaker recommends purposeful aerobic activity—such as a conversational “zone 2” pace—alongside strength training.
• General targets discussed include at least 150 minutes of moderate aerobic activity weekly and strength training on at least two days. For strength work, choose a challenging but safe effort that leaves roughly one or two good-form repetitions possible.
• One walking option is to alternate three minutes briskly with three minutes slowly for about 30 minutes.
• In one patient example, the speaker says a woman lost 22 pounds in 12 weeks and 44 pounds overall after addressing metabolic health and combining aerobic exercise with strength training. This is presented as an individual case, not a guaranteed result.

4. Eating too little

• The video cautions against assuming that ever-lower calories or longer fasts are always beneficial. Restriction may make it harder to maintain muscle, recover, stay active, and meet nutritional needs.
• A moderate overnight break from eating is distinguished from more aggressive approaches, such as eating only once a day.
• Prioritize regular, adequate nutrition and protein. The speaker gives a general protein target of at least 1.2 grams per kilogram of adjusted body weight per day, while noting that needs vary.
• Be especially cautious about combining severe restriction, prolonged fasting, and strenuous training.

5. Age-related muscle loss

• Muscle helps use glucose and supports strength, mobility, and independence. The speaker emphasizes protecting muscle while losing excess fat.
• Start with accessible strength movements such as chair stands, wall push-ups, resistance bands, or light dumbbells. Gradually increase the challenge and work within your abilities.
• Take a 10–20-minute walk after your largest meal and interrupt long periods of sitting with movement.
• Seated heel raises are also suggested as a way to activate leg muscles while at a desk, though the video notes that ordinary toe raises do not necessarily reproduce the specific research protocol it mentions.

Overall takeaway

Rather than trying to change everything at once, choose one useful adjustment for the next week—such as keeping a consistent sleep schedule, eating more protein, doing strength training instead of two cardio sessions, or taking a post-meal walk. The goal is not simply to do more or weigh less, but to support recovery, muscle, and metabolic health.

Presenters and sources

• Presenter: Dr. Tessa Damm (the subtitles also render her surname as “Dam”).
• Research and guidance mentioned: An unnamed 2010 sleep-restriction study; an unnamed fitness-tracker study of more than 60,000 people; the SWAN study; research discussed in Mayo Clinic Proceedings, Diabetes Care, and iScience; and physical activity guidelines. The subtitles do not provide study authors or full citations.