Muscles which are used in doing the exercise of horizontal leg press are The quadriceps femoris muscle which is located on the front of your thigh, extending from your knee to the hip bone. It’s responsible for knee extension and flexion, which means it helps straighten or bend your knee when you move it in either direction—for example, when you walk up stairs or run down them. When using the horizontal leg press machine, this muscle is activated as it supports your weight while pushing against the resistance provided by the machine. Also you can activate it by swinging your leg upward. The quadriceps muscle will help you sure to extend your knees vertically but it won’t help you to do the horizontal leg extension exercise or the horizontal leg press machine exercise. The main reason being that the vertical flexion is more important than the horizontal extension while doing push up or any other horizontal exercise. 
The gluteus medius and minimus muscles are located along your hips, with the gluteus maximus (larger muscle) on top of your hip bone, and the lesser known gluteus medius below it. In regular pushups, the gluteus medius and minimus muscles are not particularly active: They provide the balance needed to keep your hips in a stable position without forcing the knee to move forward; this helps you lower your body toward the ground. In doing horizontal leg extension, these muscles are working hard as they assist in moving your knees forward into extension. The psoas muscle is located on top of your hip bone. It’s also known as iliacus muscle or iliopsoas muscle—the Latin name means "loins." This muscle flexes and extends your hip, which is why it’s so important in movements such as running, cycling and rowing. Its function in horizontal leg extension isn’t quite clear, but it’s likely that performing an exercise such as the horizontal leg press machine will activate the muscle to some degree since you must perform the exercise in such a way that your hip moves through its range of motion. What Is The Horizontal Leg Press Machine The horizontal leg press machine, also called the free weight leg press machine, is a weight-lifting machine that helps you to increase weight and strength. By using this machine you can do your exercises pain-free and easier than doing regular leg work at home or in gym. You can do your leg work in a faster and more effective way. The machine itself is adjusted so the weight will be supported by the pads covering your shoulders and back, instead of your legs and knees. This removes the stress from your knees, hips and lower back making it safer for you to work out. What Are The Benefits Of Horizontal Leg Press Machine The horizontal leg press machine is one of the most important equipment in any gym. According to the experts, this type of leg exercise is most beneficial when used to increase muscle mass because it isolates specific muscles groups unlike other physical exercise that targets multi-muscle groups. 
Leg press machine
The leg press machine is a weight training machine that is used to exercise the muscles of the lower body. It is typically used to train the quadriceps, hamstrings, and glutes. A leg press machine consists of a padded bench with a central lever arm that pivots in a fixed base. The user lies on their back on the bench and places their feet under the central lever arm so that they are perpendicular to it. The user then presses up by extending their knees and hips until they are standing upright with knees locked in extension. Many leg press machines can be adjusted in such a way that the user is able to flex their knees down in this position as well. The power allocated to the user's legs during the movement is a combination of their own force and the amount of weight they are instructed to push while fully extended in the lying position. This means that, given enough weight (typically 1 or 2 kg+), and adequate strength, virtually any weight-bearing exercise can be performed with a leg press machine. In some gym equipment companies have integrated mobile phone technology into the machines for communication purposes. Research shows that some of these apps can have beneficial effects on physical fitness and may help people adhere to exercise programs. One study found that the use of a mobile phone for the exercise portion of an exercise program increases adherence to an exercise prescription by 100%. The leg press machine is often used in conjunction with the squat rack, which allows it to be performed without the user needing to lay down. Alternatively, some leg press machines allow a vertical configuration in which users place their knees at approximately 90 degrees or parallel to the floor. 
In some cases, hydraulic cylinders force the user's knees close together, increasing pressure on muscles used during exercises such as squats. Leg presses are also used in rehabilitation procedures following knee surgeries or by professional athletes and bodybuilders who wish to repair weak muscles. Leg press machines are used in physical education settings to train the lower body. Strength training has been found to be useful in improving bone density in elderly women, and it is useful for reducing the risk of falling among the elderly, persons with disabilities and people suffering from post-stroke or Parkinson's disease. However, there is little research regarding how much weight people should be lifting during resistance training. An incorrectly performed leg extension exercise on a leg press machine has been blamed for causing several career ending injuries amongst bodybuilders. This is because improper form causes excess wear and tear on knees, hips and back. Many of these injuries can lead to chronic pain and swelling. Examples include damage to the medial collateral ligament, anterior cruciate ligament, posterior cruciate ligament, iliotibial band, meniscus and the chondromalacia patellae. Proper form on a leg extension machine includes keeping a 90 degree angle in your knee while performing the movement. The leg press machine and squat rack have been blamed for causing serious joint injuries amongst weightlifters. These can be caused by lifting too much weight or landing on the platform while leaning forward while returning to an upright position with extended knees. This can cause severe stress on joints including the ankles, knees, hips and lower back. 
Horizontal leg press machine
A horizontal leg press machine is a weight training machine that is used to perform the leg press exercise. The user of the machine lies on their back on the bench and performs a straight leg press while pushing weights away from them. The leg press machine consists of a base which can be made from metal, wood and sometimes commercial plastic. The heavy weight is loaded onto the frame either by placing weights on the seat and then pushing them into position or by placing weights into a weight stack attached to the machine and lifting them with a gravity pulley to the desired height. The seat has a back rest that allows for support during the exercise, this can take various designs including handles attached to it. Leg extension machines are usually placed nearby as they require no stabilization and can be used while waiting for others to finish using the leg press machine. There are also many designs that allow both legs to be used at once rather than individually. In the 1970s and 1980s a number of universities installed horizontal leg press machines in their gymnastic halls for weight training of athletes training for the Olympics. These machines, known as "Mr. Universe" presses were designed for upper body trunk and shoulder strength training. Leg presses are used in both physical therapy and athletic rehabilitation to treat knee osteoarthritis, knee tendinitis, knee joint hypermobility, anterior cruciate ligament tears or fractures, patellofemoral pain syndrome, patellar tendinitis and atlantoacromial joint pain. Leg presses are used as a full body exercise to strengthen both the upper and lower body, improve balance and coordination. The leg press is especially useful in training a particular muscle group at an optimal intensity. By balancing different movement patterns, the risk of injury is decreased. 
Studies show that there may be an increase in muscle growth or strength using leg presses; however, there is still a lack of research on the subject which may preclude these benefits from being proven. Leg press machines can utilize a wide variety of weights to allow for appropriate weights for different individuals regardless of their starting point or ability level. However, it has been found that the effectiveness of leg presses decreases if higher loads are used. Studies have shown that inexperienced users (less than 1 year of training) benefit more than experienced users when training the legs. Injuries to the lower leg can be avoided by using leg presses with light weights for beginners or no weight at all for advanced lifters. Leg press injuries are increased if there is inappropriate form or technique. Many people use a "hamstring curl" on the seated position of a leg press machine, however this is against weightlifting rules and can cause long-term muscular strains and pain due to lack of hip extension in the bottom portion of the exercise. 
Leg press machine used muscles
The leg press machine is a common exercise for strengthening the quadriceps, hamstrings, gluteus maximus and calf muscles. This machine works by pushing the user's legs against resistance, which is often provided by weights. The leg press machine can be used to do a number of different exercises and can be adjusted depending on what muscles you want to target. For example, you can use it to do a front leg raise, which targets your abdominal muscles; or a back leg raise, which targets your glutes. Other exercises one can do with a leg press machine include the following: Leg Press Machines are most common in gyms and fitness centers, since the machines have a number of functions, and can be easily adjusted. These machines can also be used to exercise multiple joints in one motion. Leg Press Machines are also useful for exercise rehabilitation, especially when recovering from knee injuries. Leg Press Machines are both simple and complex; this is because they consist of many parts that all work together to provide resistance during the exercise, as well as to protect the user from injury. There are many different companies that make leg press weight machines, each of which have their own unique features. A common leg press machine is made up of four main parts: the base, the main frame, the seat and the control mechanisms. These parts work together to provide stability and resistance during the exercise. A typical leg press machine will be a table-top design; however, there are also upright models that look like treadmills with a seat and controls. The most common mistake that people make while exercising with a leg press machine is they do not set the correct amount of weight correctly on the machine. 
If you do not place the correct weight on the machine, then the weight on display will not be reflective of how heavy you really should be using. The proper way to set up a leg press machine is to start with your feet flat on the ground, and then step onto the foot plate of the leg press machine. Once you are in position, place your hands in front of you and grip the handles. Then pull yourself into position and make sure that your heels are both on one side of the footplate. The next step is to find an angle where you have most resistance from your legs; this is because you need to place a balance between too much or too little pressure while using a leg press machine. It is important that you adjust the weight stack of your machine to suit your strength and weight. A common mistake is to not pull the handle all the way up on the leg press machine. This can result in your joints being strained from overuse, which means that you want to be careful at all times while using a leg press machine. The leg press machine, like so many other pieces of exercise equipment, does have its risks. If a person has any serious medical conditions such as osteoarthritis or knee joint problems, then it is important for them to consult with their doctor before using this device (see Sports injury).