Wellness FAQ: Short Answers, Real Sources

Adults need 7 or more hours of sleep a night on a regular basis. That's the joint position of the American Academy of Sleep Medicine and the Sleep Research Society. The CDC breaks it down further by age.

A full cycle is often described as about 90 minutes, but it isn't fixed. The National Institute of Neurological Disorders and Stroke (NINDS) covers this. It says REM sleep first shows up about 90 minutes after you drift off. You then move through non-REM and REM sleep several times a night. Our Sleep Cycle Calculator uses that rough rhythm to suggest bedtimes.

Sleep debt is the gap between the sleep you need and the sleep you get. Miss an hour a night for five nights and you're five hours short. Long weekend lie-ins can offset some of it, but steady nightly sleep is what the guidelines stress. You can tally your own week with the Sleep Debt Calculator.

The CDC says adults need 150 minutes of moderate-intensity activity a week. You can swap that for 75 minutes of vigorous activity, or mix the two. That works out to 30 minutes on five days, though you can split it however you like.

Moderate activity raises your breathing and heart rate, but you can still talk. The CDC offers three ways to judge it:

• Energy use: 3 to 5.9 METs counts as moderate, and 6 or more is vigorous.
• Walking pace: brisk walking at 2.5 mph or faster qualifies.
• How it feels: about a 5 or 6 on a 0 to 10 effort scale.

Want a number for your own walk? The Walking Calories Burned Calculator shows where it lands.

The simplest estimate is 208 minus 0.7 times your age. Researchers Tanaka, Monahan and Seals published that formula in 2001 after pooling 351 studies. The older 220 minus age rule tends to run low for older adults. Either way, it's an average. Try the Heart Rate Zone Calculator and treat the result as a guide.

Yes. Among US gym and studio members, Pilates participation grew 28.1% between 2021 and 2025. That figure comes from the Health & Fitness Association. Yoga is still bigger, with 17.7 million participants in 2025. We compare the two in Pilates vs yoga.

The National Academies set a daily reference for total water. It's 3.7 liters for men and 2.7 liters for women. That total includes water from food. Drinks usually supply about 80% of it, so roughly 3 liters for men and 2.2 for women. Heat and exercise push needs higher. See the Water Intake Calculator for the full breakdown.

The Global Wellness Institute estimates the global wellness economy reached $6.8 trillion in 2024. That was 7.9% growth on 2023. In the US, McKinsey estimates consumers spend more than $500 billion a year on wellness. More figures are in our wellness statistics.

Not proven. Mayo Clinic notes that infrared saunas usually run at lower air temperatures. That doesn't make them more effective. Most long-term heart research looked at Finnish-style sauna bathing, not infrared cabins or blankets. Price, space and what you enjoy are fairer ways to choose. The full comparison is in infrared vs traditional sauna.

The evidence is mixed. A 2025 systematic review of 14 studies, with 194 participants, found inconsistent effects on short-term recovery. Weight you lose in a sauna is mostly water, not fat. Rehydrate afterward, and check with a clinician if you have a heart condition. We cover the studies in sauna after a workout.

Start with credentials, not price. Check these four things before you book:

• License: the clinician holds an active license, and your state lets them inject botulinum toxin.
• Who injects: you know who will treat you and what training they have.
• Setting: the clinic is properly licensed and buys products from authorized suppliers.
• Consultation: they review your history, medicines, risks and follow-up first.

Our guide on how to choose a Botox injector walks through each step.

No. Botox is one brand of botulinum toxin. Other approved products have different names and their own prescribing information. Ask your injector for the exact product name before treatment. Then you know what's going into your skin.

Quite a lot. KFF looked at firms offering health benefits in 2025. It found 83% of larger firms offered at least one wellness program. For smaller firms, the figure was 56%. Screenings and other program types are broken down in our workplace wellness statistics.

Not on its own. Offering a program doesn't guarantee people take part or that their health improves. Track participation and completion before you judge results. The cost per participant calculator in our employee wellness challenges guide helps with that.

A wellness retreat is a planned stay built around activities like movement, mindfulness and spa time. Some are luxury resorts with flexible schedules. Others are retreat centers focused on yoga or meditation. A retreat isn't medical treatment, so judge health claims on their own evidence. Browse examples in wellness retreats in the US.

Don't compare headline room rates alone. Packages differ a lot in what they include. Line up these costs side by side:

• Meals and classes: included, or charged per item?
• Treatments: spa services often cost extra.
• Taxes and gratuities: some packages add these at checkout.
• Travel: flights and transfers aren't in most quotes.

The trip budget calculator in wellness retreats in the US adds it all up for you.