
The word ham is derived from the Old English ham or hom, meaning the hollow or bend of the knee. Ham also refers to the hind portion of a pig's leg, which is sold and consumed as food. In human anatomy, the ham or hamstring refers to the three posterior thigh muscles that run between the hip and the knee: the semimembranosus, semitendinosus, and biceps femoris. These muscles are susceptible to injury, especially in athletes who engage in sprinting or quick, directional changes.
| Characteristics | Values |
|---|---|
| Hamstring muscles | semimembranosus, semitendinosus, biceps femoris |
| Location | back of the thigh, between the hip and the knee |
| Function | knee flexion, hip extension, walking, running, jumping |
| Susceptible to injury | yes, especially in athletes who run, sprint, ski, skate, dance, etc. |
| Injury type | pulled hamstring, partial tear, complete tear |
| Treatment | nonsurgical treatments, surgery, rest, warm-ups, stretches |
| Grades of strain | grade 1 (mild) to grade 3 (complete tear) |
| Injury incidence | about 2 per 1000 hours of performance; 19% of all sports injuries |
| Injury prevention | proper warm-ups, stretches, rest when feeling pain or fatigue |
| Ham weight range | 23-27 lb per side, or 47-54 lb for the whole hog |
| Bones | femur, aitch bone, shank bone |
| Muscles | inside ham, outside ham, knuckle, semitendinosus |
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What You'll Learn

Hamstring muscles are skeletal muscles
The hamstrings play a crucial role in daily activities and sports performance. They contract when the knee is bent and lengthen when the knee is extended. This action is particularly important in activities requiring quick stops, changes in direction, and acceleration, such as sprinting and playing soccer or basketball.
Due to their involvement in various lower body movements, hamstring muscles are susceptible to injuries, especially in athletes. A common hamstring injury is a ""pulled hamstring" or strain, which can range from mild to severe. Strains can be further classified as a pull, a partial tear, or a complete tear of the muscle fibres.
To prevent hamstring injuries, it is essential to properly warm up and stretch before physical activity. Maintaining muscle flexibility and balance can reduce the risk of strains and tears. Additionally, athletes should be mindful of muscle overload, as sudden or excessive loads during contractions can lead to hamstring tears.
In summary, hamstring muscles are skeletal muscles that play a vital role in lower body movement. Their function and susceptibility to injury, especially in athletic activities, make them an important area of focus for athletes and anyone engaging in physical activities.
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Susceptible to injury in athletes
The ham refers to the hamstring muscle group, which is a collection of three muscles at the back of the thigh: the biceps femoris, semitendinosus, and semimembranosus. These muscles are crucial in a range of movements, including hip extension and knee flexion, and they provide stability and facilitate powerful movements. Due to their function and anatomy, the hamstrings are susceptible to injury, especially in athletes and those engaging in regular physical activity.
The hamstring muscles are vulnerable to injury for several reasons. Firstly, the hamstrings cross two joints, the hip and the knee, which means they are active during a wide range of movements. This constant activity can lead to fatigue and micro-tears in the muscle fibers if not properly managed. Secondly, the hamstring muscle group has a complex anatomy with different nerve supplies and blood vessel networks, which can affect recovery and repair processes. A lack of awareness of proper warm-up and cool-down techniques, as well as inadequate stretching and strengthening routines, can also contribute to hamstring injuries.
Athletes are particularly susceptible due to the high demands placed on their bodies. Sports that require sudden bursts of speed, rapid changes in direction, and frequent sprinting, such as soccer, football, and track and field, have higher rates of hamstring injuries. The constant acceleration and deceleration, as well as the explosive nature of these movements, can place immense stress on the hamstrings. Additionally, athletes with weak core stability and poor pelvic control are more prone to hamstring issues as the muscles work to compensate for instability in other areas of the body.
Injury prevention strategies are key to minimizing the risk of hamstring injuries in athletes. This includes implementing proper warm-up routines that focus on dynamic stretching and gradual progression to sport-specific movements. Strengthening the hamstrings, as well as the surrounding muscle groups, through targeted exercises such as Nordic hamstring curls, good mornings, and Romanian deadlifts, can also help build resilience. Furthermore, educating athletes about the importance of proper recovery and listening to their bodies can help prevent overexertion and promote timely intervention if issues arise.
Early identification and treatment of hamstring injuries are crucial for optimal recovery and to prevent chronic issues. Athletes should be encouraged to report any signs of hamstring strain, including tightness, soreness, or pain, and medical professionals should be involved to provide appropriate treatment plans. A combination of rest, ice, compression, and elevation (RICE) is often recommended in the initial stages, followed by gradual rehabilitation exercises to restore strength and flexibility. With proper management, most hamstring injuries can be successfully treated, allowing athletes to return to their sport with minimal long-term effects.
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Three posterior thigh muscles
The ham is derived from the Old English "ham" or "hom", meaning the hollow or bend of the knee. In human anatomy, the hamstring is any one of the three posterior thigh muscles located between the hip and the knee. These three muscles are the semimembranosus, semitendinosus, and biceps femoris.
The semimembranosus muscle is one of the three true hamstrings that cross both the hip and knee joints. It is involved in knee flexion and hip extension. The semitendinosus is located between the semimembranosus and the biceps femoris, and it shares the same function as the semimembranosus. Both muscles help to flex the knee and medially (inwardly) rotate the lower leg when the knee is bent. They also extend the hip when the trunk is fixed.
The biceps femoris is the third hamstring muscle, located on the outside of the back of the thigh. It is involved in knee flexion and hip extension, and it laterally (outwardly) rotates the lower leg when the knee is bent. The biceps femoris is the most commonly injured hamstring, followed by the semitendinosus. These injuries are frequent among athletes who run at fast speeds or participate in sports that require sprinting, such as track, soccer, basketball, and waterskiing.
The hamstring muscles are skeletal muscles that play a crucial role in daily activities such as walking, running, jumping, and controlling some movement in the gluteus. They contract when the knee is bent and lengthen when the knee is extended. These muscles contain thousands of long, elastic muscle fibres that help the leg muscles contract or tighten.
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True hamstrings cross hip and knee joints
Hamstring muscles are any of the three posterior thigh muscles in human anatomy between the hip and the knee: the semimembranosus, semitendinosus, and biceps femoris. The word "ham" is derived from the Old English "ham" or "hom," meaning the hollow or bend of the knee.
The three "true" hamstrings cross both the hip and knee joints and are therefore involved in knee flexion and hip extension. They are biarticular muscles, meaning they act upon two joints. The hamstrings contract when the knee is bent and lengthen when the knee is extended, and when the hips are extended.
The semitendinosus and semimembranosus extend the hip when the trunk is fixed; they also flex the knee and medially (inwardly) rotate the lower leg when the knee is bent. The long head of the biceps femoris extends the hip, as when beginning to walk; both short and long heads flex the knee and laterally (outwardly) rotate the lower leg when the knee is bent.
The hamstrings play a crucial role in many daily activities such as walking, running, jumping, and controlling some movement in the gluteus. They are very susceptible to injury, especially in athletes who run, sprint, or participate in sports that require quick stops and starts, such as soccer, basketball, football, and waterskiing. A common hamstring injury is a pulled hamstring or strain, which can range from mild to severe.
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Ham as food—muscles and bones
When referring to food, the term "ham" describes a cut of meat that specifically comes from the hind leg or thigh of a pig. This cut of meat includes several muscles, which are responsible for the movement and stability of the pig's hind leg. The primary muscles in a ham include the biceps femoris, semitendinosus, semimembranosus, and adductor magnus. These muscles are collectively known as the ham muscles and make up a significant portion of the meat that we consume as ham.
Each of these muscles has a distinct role in the pig's anatomy and contributes to the overall characteristics of the ham. The biceps femoris is a large, powerful muscle located at the back of the thigh, responsible for hip extension and knee flexion. The semitendinosus and semimembranosus are two muscles located deep within the thigh, contributing to knee stability and movement. The adductor magnus, as the name suggests, is involved in adducting the leg, moving it towards the body, and also plays a role in hip extension.
When preparing a ham for consumption, the muscles are usually left intact, creating a single, large cut of meat. This preservation of muscle structure gives ham its distinctive shape and appearance. Additionally, the muscles in the ham are surrounded by a layer of fat, known as the "fat cap," which adds flavor and moisture to the meat during cooking. The specific muscles found in the ham can vary slightly depending on the cut and the butchering process, but the primary muscles mentioned earlier are consistent across different types of ham preparations.
It's important to note that the bones are usually removed from the ham before it is sold or cooked. The pig's femur and pelvis are the primary bones associated with the ham cut. These bones provide structure and support for the attached muscles and are quite large and sturdy. During the butchering process, these bones are typically removed to create a boneless ham, making it easier to slice and serve. However, some traditional ham preparations, like the Italian "prosciutto crudo," involve curing the ham with the bone still intact, as it is believed to enhance the flavor and texture of the meat.
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Frequently asked questions
A ham is a cut of pork meat from the back half of a pig, comprising about 9% of the live animal and about 12% of the pork carcass.
A ham has four major muscles: the inside ham, the outside ham, the knuckle, and the semitendinosus or eye muscle.
The femur or centre bone is the largest bone in a ham.
The ham in human anatomy refers to the hamstring, which is any one of the three posterior thigh muscles between the hip and the knee: the semimembranosus, semitendinosus, and biceps femoris.
The ham/hamstring plays a crucial role in many daily activities such as walking, running, jumping, and controlling some movement in the gluteus.













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