What to Expect at Your First Spin Class

What spin class actually is

A spin class is a 45-minute instructor-led indoor cycling workout on a stationary bike with a weighted flywheel. The instructor picks a playlist, calls out intervals (sprints, climbs, jumps), and adjusts the resistance on their bike while you adjust yours. You are not actually moving forward. You are pedaling against resistance. The format was popularized by Johnny G in the late 1980s as "Spinning" (a trademark of Mad Dogg Athletics), and the word has since become generic. SoulCycle launched in 2006, Flywheel in 2010, Peloton brought the format into homes in 2014, and chain gyms (LA Fitness, 24 Hour Fitness, Equinox) have offered spin since the early 2000s.

Spin is not the same as outdoor cycling. The bike does not move underneath you. The flywheel carries momentum, so your legs get pulled through the bottom of the pedal stroke. You cannot coast. The muscle recruitment pattern is similar but not identical to outdoor riding. People who come to spin from outdoor cycling are often surprised by how hard the standing climbs are. People who come from running are surprised by how much quad burn there is and how little calf and shin work. This guide covers what to wear, how to set up the bike, what the class structure looks like, and what to actually expect from your first session. For a wider comparison of class formats, read our fitness class glossary.

What to wear (and what not to)

Padded cycling shorts are optional for your first class. They become non-optional around class 3 or 4, when the saddle soreness catches up with you. For class 1, regular workout shorts or leggings are fine. If you have cycling shorts with a chamois, wear them. If not, do not buy them for class 1.

Stiff-soled shoes are more important than padded shorts. Running shoes have flexible soles that bend across the pedal, which wastes power and creates hot spots on the bottom of your foot. A flat-soled cross-trainer or Vans-style shoe is better. The best option is a clipless shoe (Look Delta or SPD-SL, depending on the studio), but most gyms do not require them and most beginners do not own them. SoulCycle and Flywheel provide clipless shoes as part of the class fee. Equinox and chain gyms usually do not. Call ahead and ask.

A moisture-wicking top. A small towel. A water bottle with at least 20 ounces. Do not bring a cotton t-shirt. Cotton soaks through and stays wet. The studio will be 70 to 74 degrees and you will generate your own microclimate of sweat within 10 minutes.

Bike setup in 90 seconds

Bike setup is the difference between a good first class and a knee injury. Three adjustments matter: saddle height, saddle fore/aft (front-to-back position), and handlebar height. The instructor should help you on day one. If they do not offer, ask. This is their job.

Saddle height: stand next to the bike. The saddle should be at the level of your hip bone (the iliac crest). When you sit on the bike and put your foot at the bottom of the pedal stroke (6 o'clock position), your knee should be bent 25 to 35 degrees. If your knee is locked, the saddle is too high. If your knee is bent more than 35 degrees, the saddle is too low and you will get patellofemoral pain in 15 minutes.

Saddle fore/aft: with your feet in the pedals at 3 o'clock and 9 o'clock (horizontal), a plumb line from the front of your forward knee should drop to the center of the pedal spindle. Most beginners sit too far back. Move the saddle forward one notch if you are unsure.

Handlebar height: start with the handlebars at the same height as the saddle. If you have lower-back pain, raise them one or two notches. Lower handlebars (below saddle height) are for experienced riders and produce more hip flexor activation. Do not go there in class 1.

The class structure

A 45-minute spin class has five segments. The warmup is 5 to 8 minutes at low resistance and 80 to 100 RPM (revolutions per minute). The instructor will check form, cue breathing, and let you settle in. The main working block is 25 to 30 minutes, broken into intervals: 1 to 4 minute sprints at 90 to 110 RPM, 2 to 5 minute climbs at 60 to 70 RPM with high resistance, and 30 to 60 second jumps (transitioning between seated and standing every 8 to 16 beats). The cool-down is 5 minutes of easy pedaling. The stretch is 5 minutes off the bike, focusing on quads, hamstrings, hip flexors, and calves.

The instructor will call out numbers for resistance and RPM. On a bike with a resistance dial (most chain gyms), the dial goes from 1 to 100. On a Peloton, resistance goes from 1 to 100. On a SoulCycle bike, the resistance is a knob with no numbers, and you adjust by feel. The instructor will say "add a quarter turn" or "add a half turn." Do not match the person next to you. Match the cue and adjust based on your perceived effort.

The metrics that matter

Three metrics are common on modern spin bikes: RPM (cadence), resistance (a number from 1 to 100), and wattage (power output). Heart rate is also common if you wear a chest strap or the bike has hand sensors.

RPM is the only metric that matters for beginners. Aim for 80 to 100 RPM on flats and sprints, 60 to 70 RPM on climbs. Stay within those ranges. If you cannot maintain 60 RPM on a climb, lower the resistance. If you can pedal at 120 RPM without bouncing, add resistance.

Wattage is a vanity metric for beginners. It depends on your weight, fitness, and the bike calibration. Comparing your watts to the person next to you is comparing apples to a different apple on a different scale. Ignore it for the first 10 classes. Resistance matters because it is the load. RPM matters because it is the speed. Wattage is the product of the two and is best used as a personal tracking metric after you have a baseline.

How hard to push on day one

On a scale of 1 to 10 (RPE, rating of perceived exertion), aim for 5 to 6 for the first half of class and 6 to 7 for the second half. You should be breathing hard but able to speak in short sentences. If you cannot speak at all, you are at RPE 9 and you need to back off. If you can hold a full conversation, you are at RPE 3 and you need to add resistance.

The single biggest mistake beginners make in spin class is going too hard in the first 10 minutes. The playlist is loud. The instructor is enthusiastic. The room is dark. The vibe says "go all out." If you go all out in minute 8, you will be in the back row gasping by minute 25. Spin is an endurance format. Pace yourself. The American Heart Association recommends 150 minutes of moderate-intensity cardio per week. A 45-minute spin class at RPE 6 counts as 45 of those minutes.

Soreness expectations

You will be sore the day after your first class. The soreness is mostly in the quads. Some in the glutes. A little in the calves. The saddle will also leave a sore spot on your sit bones (ischial tuberosities) that lasts 2 to 4 days. This is normal. It is not injury. It is your body adapting to a new movement pattern and a new pressure pattern.

The soreness peaks at 36 to 48 hours post-class. It resolves in 3 to 5 days. Walking helps. Light cycling helps. Sitting on a couch does not. Do not take your second class until the soreness has dropped to a 2 out of 10. For most beginners, that is 3 to 4 days after class 1. Going back on day 2 because you are "motivated" is how people quit after 2 classes. Recovery is part of the program.

Calorie burn reality

SoulCycle claims 500 to 700 calories per 45-minute class. Flywheel claims similar. Peloton's app shows an average of 400 to 600 for beginners and 600 to 800 for experienced riders. The honest number for most beginners is 350 to 500 calories in a 45-minute class. Smaller riders (under 130 pounds) burn closer to 350. Larger riders (over 180 pounds) burn closer to 500. Heavier people burn more calories at the same RPE because they are moving more mass.

The calorie burn is not the main benefit of spin. The main benefit is cardiovascular fitness. A 2023 study in the Journal of Strength and Conditioning Research found that 8 weeks of spin classes (3 per week) improved VO2 max by 11 to 18% in previously sedentary adults. That is a real, measurable improvement in heart and lung function. Calorie burn is a side effect. If you are spinning for weight loss, track your food. Spin alone, without a calorie deficit, will not produce weight loss. It will produce fitness.

SoulCycle vs Flywheel vs Peloton vs gym spin

The format you pick matters less than the instructor you click with. Try 3 instructors at the same studio before you decide spin is not for you. The right instructor can make a 6am class feel like a party. The wrong one can make a 6pm class feel like a dentist appointment.

How often to spin as a beginner

Once or twice a week for the first 4 weeks. Then 2 to 3 times per week if you want to make it your primary cardio. More than 3 times per week is overkill for most people. Spin is repetitive. Doing it 5 times a week risks overuse injuries in the knees, hips, and lower back. The American College of Sports Medicine recommends cross-training for cyclists. Lift weights once or twice a week. Walk. Do yoga. Spin is one piece of a fitness program, not the whole program.

If you fall in love with spin, you will want to go every day. Do not. Your legs need 48 hours between hard efforts. Two spin classes on consecutive days is fine if one is at RPE 5 and the other is at RPE 7. Two hard classes on consecutive days is not fine. You will plateau in week 6 and quit in week 8.

When spin is not for you

Spin is not for you if you have unresolved lower-back pain that gets worse with sitting. The bike position is forward-flexed, which aggravates disc issues. Try a recumbent bike or swimming instead. Spin is also not for you if you have patellofemoral pain syndrome (runner's knee) that flares with repetitive knee flexion. The pedal stroke is 80 to 100 revolutions per minute. That is 3,600 to 4,500 knee flexions per 45-minute class. If your knees hurt after class 1, see a physical therapist before class 2.

Spin is also not for you if you hate loud music and dark rooms. That is the format. You cannot opt out of it. If you want to cycle to your own music in a lit room, get a stationary bike for home or ride outside. The group format is the product. If you do not want the group format, you do not want spin class.

Case in point: Sara, 28, in Chicago, took her first spin class at a local gym spin studio in February 2026. She had been running 3 times a week and wanted to add variety. She went too hard in the first 10 minutes (RPE 9), had to back off for the rest of class, and was sore for 5 days. She came back for a second class the next week, kept her RPE at 6, finished the full 45 minutes, and was only sore for 2 days. By class 6, she was keeping up with the instructor's cues at the prescribed resistance. She now spins twice a week and runs twice a week. The first class was rough. The sixth class was the one that hooked her. Most people quit after class 1 or 2. The ones who make it to class 6 tend to stay. Find a spin class at a studio near you and book your first one this week. New to HIIT? Our first HIIT class guide covers what to wear, how hard to push, and how to scale.