Exercise apparatus suitable for individually exercising selected muscle groups in a person's legs by stretching and/or retraction, which exercise apparatus (2, 502, 1202, 1302, 1702, 1802, 1902) comprises, a controller, at least a first frame (8, 508, 608, 708, 808, 1008, 1208, 1308, 1408, 1508, 1608, 1708, 1808) and at least a first foot platform (12, 212, 312, 512, 612, 712, 812, 912, 1212, 1312, 1412, 1512, 1812), said foot platform is mounted on a foot platform bracket (558, 674, 758, 858, 1258, 1458, 1558, 1858, 1958) which can rotate around a bearing (548, 748, 848, 1248, 1348, 1448, 1548, 1848) fastened to the first frame (8, 508, 608, 708, 808, 1008, 1208, 1308, 1408, 1508, 1608, 1708, 1808), which bearing (548, 748, 848, 1248, 1348, 1448, 1548, 1848) is configured to permit rotation of the at least first foot platform to allow the person's foot at least plantar flexion and/or dorsal flexion, which exercise apparatus (2, 502, 1202, 1302, 1702, 1802, 1902) further comprises at least one actuator and/or restriction element (570, 670, 770, 870, 1241, 1243, 1341, 1343, 1441, 1443, 1841, 1843, 1941, 1943) connected to the foot platform bracket (558, 674, 758, 858, 1258, 1458, 1558, 1858, 1958) and at least one actuator (40, 42, 140, 142, 240, 242, 540, 542, 640, 642, 842, 1140, 1142, 1240, 1242, 1340, 1342, 1542, 1840, 1842, 2040, 2042) connected to a leg support (30, 32, 130, 132, 230, 232, 530, 532, 630, 730, 732, 830, 832, 930, 932, 1230, 1232, 1330, 1530), wherein said leg support (30, 32, 130, 132, 230, 232, 530, 532, 630, 730, 732, 830, 832, 930, 932, 1230, 1232, 1330, 1530) is fastened to said first frame via another bearing (548, 748, 848, 1248, 1348, 1448, 1548, 1848) configured to permit rotation of the leg support (30, 32, 130, 132, 230, 232, 530, 532, 630, 730, 732, 830, 832, 930, 932, 1230, 1232, 1330, 1530), and wherein - one or more sensors (415, 715, 815, 915, 1115) are provided for measuring the force exerted at the leg support (30, 32, 130, 132, 230, 232, 530, 532, 630, 730, 732, 830, 832, 930, 932, 1230, 1232, 1330, 1530), wherein the position and movement of the leg support (30, 32, 130, 132, 230, 232, 530, 532, 630, 730, 732, 830, 832, 930, 932, 1230, 1232, 1330, 1530) is controllable by the controller and at least one actuator adapted to be controlled based on the force measurement of the one or more sensors of the leg support, and - one or more sensors (211, 311, 811, 1111) are provided for measuring the force exerted at the foot platform (12, 212, 312, 512, 612, 712, 812, 912, 1212, 1312, 1412, 1512, 1812), wherein the position and movement of the foot platform (12, 212, 312, 512, 612, 712, 812, 912, 1212, 1312, 1412, 1512, 1812) is controllable by the controller and at least one actuator and/or restriction element adapted to be controlled based on the force measurement of the one or more sensors of the foot platform (12, 212, 312, 512, 612, 712, 812, 912, 1212, 1312, 1412, 1512, 1812), and that the angular movement of the foot platform (12, 212, 312, 512, 612, 712, 812, 912, 1212, 1312, 1412, 1512, 1812) is individually controlled in relation to the mostly horizontal movement and/or position of the leg support (30, 32, 130, 132, 230, 232, 530, 532, 630, 730, 732, 830, 832, 930, 932, 1230, 1232, 1330, 1530). - one or more sensors (415, 715, 815, 915, 1115) are provided for measuring the force exerted at the leg support (30, 32, 130, 132, 230, 232, 530, 532, 630, 730, 732, 830, 832, 930, 932, 1230, 1232, 1330, 1530), wherein the position and movement of the leg support (30, 32, 130, 132, 230, 232, 530, 532, 630, 730, 732, 830, 832, 930, 932, 1230, 1232, 1330, 1530) is controllable by the controller and at least one actuator adapted to be controlled based on the force measurement of the one or more sensors of the leg support, and - one or more sensors (211, 311, 811, 1111) are provided for measuring the force exerted at the foot platform (12, 212, 312, 512, 612, 712, 812, 912, 1212, 1312, 1412, 1512, 1812), wherein the position and movement of the foot platform (12, 212, 312, 512, 612, 712, 812, 912, 1212, 1312, 1412, 1512, 1812) is controllable by the controller and at least one actuator and/or restriction element adapted to be controlled based on the force measurement of the one or more sensors of the foot platform (12, 212, 312, 512, 612, 712, 812, 912, 1212, 1312, 1412, 1512, 1812), and