Focusing too much on one type of training

This is a common mistake that people make, especially when they're trying to build muscle mass. They'll do the same routine over and over again, which will lead to plateaus and eventually burnout. To avoid this problem, you need to switch up your workouts so that different muscle groups are trained each day or two days in a row instead of exclusively focusing on one specific area (like chest) every day for several weeks at a time--and then switching back to another body part (like biceps).

Ditching warm up’s

Many people don’t warm up before starting their workout. It’s true that you can jump straight into your exercise routine, but there are a few reasons why warming up is important:

• Warming up prepares the body for exercise and increases blood flow to muscles. This helps prevent injuries and soreness by increasing flexibility and range of motion, which reduces risk of injury during physical activity.
• Warming up also raises core body temperature, which means you will be able to work out harder without getting tired as quickly. A proper warm-up helps get you ready for an intense workout so that you aren't wasting time trying to catch your breath halfway through.

Skimping on sleep

The importance of sleep cannot be overstated. You need to get enough sleep in order to repair and regenerate your muscles, rebuild your bones, replenish your brain function, regulate hormones, and feel more energized the next day. Sleep also helps you make better food choices because it promotes satiety (the feeling of being full). If you're not getting enough quality shut-eye at night, then you'll be more likely to reach for unhealthy snacks or eat a larger than usual meal when lunchtime rolls around.

Not eating enough calories or not having enough macros.

There are three macronutrients that your body needs to function properly: protein, carbohydrates and fats. These macros are important for daily energy and overall health. You should consume a specific amount of each macro per day depending on your activity level, goals and weight loss or gain goals.

Not tracking your progress

One of the biggest mistakes you can make is not tracking your progress. By tracking your progress, you'll be able to see what's working and what isn't. If you're trying to lose weight, it's important to see how much weight you've lost each week so that you can keep going when things start getting a little tough.

It also helps if the results aren't always positive. Sometimes we get so focused on losing weight or gaining muscle that we forget about the other aspects of fitness: cardiovascular health and flexibility come into play too! If one month is good for cutting down on body fat but bad at helping with strength training, then next time around focus more on adding weights rather than dieting yourself down even further (which could lead to injury).

Training before fuelling your body

If you're new to working out or trying to build muscle, a common mistake is not paying attention to what you eat. When it comes to fuelling your body for a workout, timing is everything. If you haven't eaten for two hours before heading into the gym (and many of us don't), then you're not properly prepared for the physical demands ahead.

Your muscles need fuel in order for them to perform at their best and recover after the workout so that they grow stronger and denser. Without proper nutrition first thing in the morning, it becomes more difficult for your body to achieve its fitness goals.