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Differences in muscle buffer capacity between team sport endurances trained and untrained females
Hyaline cartilage injuries. Treating osteochondral defects with osteochrondral autologous transplantation E. Hohmann*, D. Schoettle & A. Luhoff University Of Munich
Introduction: Osteochondral autologous transplantation (OATS) is a new technique for the treatment of osteochondral defects. Methods: In a prospective study between April 1996 and May 2001 we used the used the OATS technique to treat 201 patients (125 male, 76 female) with a mean osteochondral defect of 3,3 cm2. The defect was in the medial femoral condyle in 96 cases, the lateral femoral condyle in 16, the patella in 22, the trochlea in seven, the tibial plateau in one, the talus in 48, the tibial plafond in two and capitellum in four. There were 17 other locations. The procedure was performed either open or arthroscopically. A mean of 2,2 cylinders was transplanted. Results: The Lysholm score in the lower limbs increased from a preoperative mean of 58,3 (20 to 77) to a mean of 90,2 (70 to 100). Treatment by OATS alone increased the score from 65,2 to 91,6. With additional ACL/PCL reconstruction, the score increased from 49,9 to 82,6. The combination of OATS, HTO, ACL/PCL reconstruction increased the Lysholm score from 55,5 to 85,5.10% of patients complained of pain at the donor site in the lateral femoral condyle. There were no complications related to OATS performed in the upper limbs, and control MRO three months postoperatively showed incorporation of all cylinders. Discussion: The results are encouraging, and give rise, to the hope that this costeffective and safe treatment for limited osteochondral defects may delay or even prevent the onset of osteoarthritis
Differences in muscle buffer capacity between team sport endurances trained and untrained females J. Edge* & D. Bishop University Of Western Australia, Crawley,Australia
We measured the muscle buffer capacity of young females (19 + 2 y), who competed in team sports (TS, n=8), endurance sports (ES, n=7) or who were physically active but not involved in regular training (UT, n=8). All subjects performed a graded exercise test to determine VO2peak followed two days later by a test of repeated sprint ability (RSA; 5 x 6 s, every 30 s). Resting muscle samples (Vastus lateralis) were taken to determine in-vitro muscle buffer capacity. The TS group had a significantly higher muscle buffer capacity than either the ES or the UT groups (Mean+SD, 184.5+ 29.2, 122.0+34.7, 139.9+25.4 tJmol H+.g-1 dm.pH-I for TS, ET and UT respectively; P<0.05). Both the TS and ES groups had a significantly higher RSA (286+35 and 264+36 J.kg-1, respectively) then the UT group' (221+21 J.kgl; P<0.05), however the difference between TS and ES was not significant. The ES group had a significantly higher VO2peak than the UT group, however the difference between the ES group and the TS group was not significant (43.3+7.5, 49.6+3.5, 38.6 ( 4.3 mL,kg-lmin-1 for TS, ES and UT respectively). Our findings show that young females competing in team sports have a greater muscle buffering capability then either endurance trained or untrained females. This may be the result of the intermittent, high-intensity activity during training and match play of team sports and supports previous findings showing intermittent, high-intensity but not continuous, moderate-intensity training can improve muscle buffer capacity.
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Introduction: Osteochondral autologous transplantation (OATS) is a new technique for the treatment of osteochondral defects. Methods: In a prospective study between April 1996 and May 2001 we used the used the OATS technique to treat 201 patients (125 male, 76 female) with a mean osteochondral defect of 3,3 cm2. The defect was in the medial femoral condyle in 96 cases, the lateral femoral condyle in 16, the patella in 22, the trochlea in seven, the tibial plateau in one, the talus in 48, the tibial plafond in two and capitellum in four. There were 17 other locations. The procedure was performed either open or arthroscopically. A mean of 2,2 cylinders was transplanted. Results: The Lysholm score in the lower limbs increased from a preoperative mean of 58,3 (20 to 77) to a mean of 90,2 (70 to 100). Treatment by OATS alone increased the score from 65,2 to 91,6. With additional ACL/PCL reconstruction, the score increased from 49,9 to 82,6. The combination of OATS, HTO, ACL/PCL reconstruction increased the Lysholm score from 55,5 to 85,5.10% of patients complained of pain at the donor site in the lateral femoral condyle. There were no complications related to OATS performed in the upper limbs, and control MRO three months postoperatively showed incorporation of all cylinders. Discussion: The results are encouraging, and give rise, to the hope that this costeffective and safe treatment for limited osteochondral defects may delay or even prevent the onset of osteoarthritis
Differences in muscle buffer capacity between team sport endurances trained and untrained females J. Edge* & D. Bishop University Of Western Australia, Crawley,Australia
We measured the muscle buffer capacity of young females (19 + 2 y), who competed in team sports (TS, n=8), endurance sports (ES, n=7) or who were physically active but not involved in regular training (UT, n=8). All subjects performed a graded exercise test to determine VO2peak followed two days later by a test of repeated sprint ability (RSA; 5 x 6 s, every 30 s). Resting muscle samples (Vastus lateralis) were taken to determine in-vitro muscle buffer capacity. The TS group had a significantly higher muscle buffer capacity than either the ES or the UT groups (Mean+SD, 184.5+ 29.2, 122.0+34.7, 139.9+25.4 tJmol H+.g-1 dm.pH-I for TS, ET and UT respectively; P<0.05). Both the TS and ES groups had a significantly higher RSA (286+35 and 264+36 J.kg-1, respectively) then the UT group' (221+21 J.kgl; P<0.05), however the difference between TS and ES was not significant. The ES group had a significantly higher VO2peak than the UT group, however the difference between the ES group and the TS group was not significant (43.3+7.5, 49.6+3.5, 38.6 ( 4.3 mL,kg-lmin-1 for TS, ES and UT respectively). Our findings show that young females competing in team sports have a greater muscle buffering capability then either endurance trained or untrained females. This may be the result of the intermittent, high-intensity activity during training and match play of team sports and supports previous findings showing intermittent, high-intensity but not continuous, moderate-intensity training can improve muscle buffer capacity.
530