Leg weakness can occur as part of a generalized feeling of weakness all over your body, or it may develop in one or both legs. True weakness occurs when the muscles lose their strength, but people often perceive that their muscles are weak when they feel ill or tired. In these cases there is not a true loss of muscle function.
http://www.healthgrades.com/symptoms/leg-weakness
“It’s not OK to be tired all the time,” says Doneen. And it’s totally OK to schedule a doctor’s appointment with the complaint of, “I’m tired.” Be specific when you talk to your health professional though to help identify what’s causing your fatigue.
http://dailyburn.com/life/lifestyle/exhausted-symptoms-find-relief/
Tired, heavy-feeling legs. We have all had tired, heavy-feeling legs after a day at an amusement park. However, if your legs consistently feel tired and heavy in the evening, this may indicate that your return blood flow from the legs to the heart is impaired. While gravity is the cause, weakened veins are the culprit. The result is oxygen-depletion in your legs, giving you that heavy, tired feeling. Leg pain from prolonged sitting or standing. In addition to getting you going, your leg muscles massage your veins and get your blood going! During prolonged periods of sitting or standing, your blood may collect in your legs and ankles. The leg veins stretch easily and may become enlarged by the pressure of the pooled blood. This can cause a dull, aching pain.
http://www.drdonnica.com/today/00009235.htm
The sudden onset of muscle weakness can be a sign of stroke, a potentially life-threatening condition in which part of the brain is deprived of oxygen. This article focuses on conditions that cause a true loss of strength in the leg muscles. Among the most common causes for leg weakness is sciatica, problems with the spinal cord that lead to pinching or compression of the nerves as they exit the spinal cord through the holes between the vertebrae of the backbone. Sciatica may be caused by various conditions.
http://www.healthgrades.com/symptoms/leg-weakness
Listen to Your Legs At some point, nearly every adult woman will have some leg complaints: varicose or spider veins; swelling or aching; muscle cramps; hip, knee or ankle pain. While these symptoms are common, they are not normal and they deserve medical attention.
http://www.drdonnica.com/today/00009235.htm
8. The neurological disorder restless legs syndrome can make you feel like you have the urge to move your legs often. You might have a desire to stretch them, bounce them, fidget, or experience aches or pains and feel relief when you get up and walk around.
http://dailyburn.com/life/lifestyle/exhausted-symptoms-find-relief/
The degree of weakness often is directly proportional to the degree of fear or stress. Also, since stress hormones are stimulants, a body that is persistently stress response overstimulated can become tired and feel weak. This weakness often is experienced in the limbs, such as the arms and legs.
http://www.anxietycentre.com/anxiety-symptoms/weak-legs.shtml
4. Anemia can happen when your body isn’t producing enough red blood cells or the red blood cells don’t contain enough iron-rich hemoglobin, says Amy L. Doneen, ARNP, medical director of the Heart Attack & Stroke Prevention Center. That lack of oxygen-rich blood in your body can make you feel tired and weak.
http://dailyburn.com/life/lifestyle/exhausted-symptoms-find-relief/
You also may feel that your legs or knees are too stiff to move or that your legs won’t move as you would like them to. Because anxiety symptom descriptions are subjective, there can be many other descriptions for this weak legs symptom.
http://www.anxietycentre.com/anxiety-symptoms/weak-legs.shtml
You’re anemic. Anemia can happen when your body isn’t producing enough red blood cells or the red blood cells don’t contain enough iron-rich hemoglobin, says Amy L. Doneen, ARNP, medical director of the Heart Attack & Stroke Prevention Center.
http://dailyburn.com/life/lifestyle/exhausted-symptoms-find-relief/
what makes your legs tired
Oxygen-depletion in your legs and due to prolonged sitting or standing makes your legs tired. The result is oxygen-depletion in your legs, giving you that heavy, tired feeling.