Variations in the Bone Status of Contralateral and Regional Sites in Young Athletic Women.

Lee, Eva J.; Long, Kelly A.; Risser, William L.; Poindexter, Hally B. W.; Gibbons, William E.; Goldzieher, Joseph W.

doi:10.1249/00005768-199505001-00169

Cited by 37 publications

(41 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The lack of difference in lumbar spine BMD in this study is in accordance with several other studies on the effect of non-weight-bearing activities [27,28,37,38]. There are, however, some studies that have reported an increased lumbar spine BMD in athletes in non-weight-bearing sports [34,42,46,47].…”

Section: Discussionsupporting

confidence: 91%

“…In the kayakers however, these differences were not significant, which is probably due to the bilateral loading pattern of the sport. A similar finding was made by Lee and colleagues [28] who found no significant difference between the left and right arm BMD of swimmers, also a bilateral sport, while they found significant differences in controls and players of volleyball, basketball, and, soccer.…”

Section: Discussionsupporting

confidence: 85%

“…Nonweightbearing activities have not been shown to have such an established effect [27,28,[36][37][38].…”

Section: Discussionmentioning

confidence: 99%

“…Some investigators have reported a beneficial effect on BMD [34,35], whereas others have not [27,28,36,37]. In cycling, which is also classified as a non-weight-bearing sport, Heinonen et al [38] found no significant difference in BMD of the lower body sites in female cyclists compared with controls.…”

mentioning

confidence: 99%

“…Several studies, both cross-sectional and longitudinal, have reported greater BMD in subjects engaged in weight-bearing activities compared with sedentary controls [17][18][19][20][21][22][23], however, other studies have failed to establish such a relationship [24,25]. Impact loading, defined by Grimston et al [26] as weight-bearing activities producing loads of at least three times body weight, has been suggested to be more osteogenic than other weight-bearing activities [27][28][29][30][31]. Some impact-loading endurance sports have, however, been shown to have a detrimental effect on bone in both males and females, probably due to hormonal changes that result in a decrease in body weight [31][32][33].…”

mentioning

confidence: 99%

See 4 more Smart Citations

Bone Mineral Density in Flatwater Sprint Kayakers

1999

View full text Add to dashboard Cite

To elucidate the possible skeletal benefits of the muscular contractions and the nonweight-bearing loading pattern associated with kayaking, we investigated the bone mineral density (BMD, g/cm2) of 10 elite kayakers, six males and four females, with a median age of 19 years. Each subject was compared with the mean value of two matched controls. BMD of the total body, head, ribs, humerus, legs, proximal femur (neck, wards, trochanter), spine, lumbar spine, and bone mineral content (BMC, g), of the arms was obtained using a dual energy X-ray absorptiometer (DXA). Body composition was also assessed. The kayakers had a significantly (P< 0.05-0.01) greater BMD in most upper body sites: left and right humerus (10.4% and 11. 7%), respectively, ribs (6.4%), spine (10.9%), and a greater BMC of the left and right arm (15.7% and 10.6%, respectively). No significant differences in the BMD of the total body, head, or any of the lower body sites were found, except for the pelvis, which was significantly greater in kayakers (5.1%). The controls had a significantly lesser lean body mass (10.4%) and greater percentage of body fat (19.5%) than the kayakers. Bivariate correlation analysis in the controls demonstrated significant and strong relationships between BMD in upper body sites and lean body mass, weight, and fat; the effects of training seem to outweigh most such relationships in kayakers. In conclusion, it seems that the loading pattern and muscular contractions associated with kayaking may result in site-specific adaptations of the skeleton.

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 85%

“…Nonweightbearing activities have not been shown to have such an established effect [27,28,[36][37][38].…”

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Bone Mineral Density in Flatwater Sprint Kayakers

1999

View full text Add to dashboard Cite

show abstract

Effect of physical activity on bone mineral density assessed by limb dominance across the lifespan

et al. 2000

View full text Add to dashboard Cite

Bone mineral density is higher in dominant vs. nondominant limbs, implying that the greater use of dominant limbs in everyday activities results in the deposition of more bone or that the dominant limb is genetically larger. The objective of the present study was to determine whether bone mineral density differences between dominant and nondominant arms were greater in older vs. younger women. To determine whether this was due to a greater lifetime of preferential loading of the dominant arm, differences between dominant and nondominant arms were compared to accumulated amounts of physical activities which emphasized use of the dominant arm. Bone mineral density of dominant and nondominant arms was assessed by dual-energy X-ray absorptiometry in groups of younger (n ‫ס‬ 35; age ‫ס‬ 20.9) and older (n ‫ס‬ 53; age ‫ס‬ 57.4) women. The difference between arms was greater in the older vs. the younger group (5.2% vs. 1.9%, respectively, P < 0.01). Within the older group, total lifetime energy expenditure during activities emphasizing loading of the dominant arm correlated with the bone mineral difference between dominant and nondominant arms (r ‫ס‬ 0.47, P < 0.01). This implies that a greater lifetime of preferential loading of the dominant arm in the older group resulted in a greater difference between arms.

show abstract

The osteogenic effects of swimming on bone mass, strength, and microarchitecture in rats with unloading-induced bone loss

Volpon

Silva

Falcai

et al. 2015

Microsc. Res. Tech.

View full text Add to dashboard Cite

The effect of nonweight-bearing exercise on osteoporotic bones remains controversial and inconclusive. The purpose of this study was to evaluate the effects of swimming on osteoporotic tibias of rats submitted to hindlimb suspension. Initially, 20 Wistar rats were used to confirm a significant bone loss following 21 days of unloading. Thirty rats were then divided into 3 groups and followed during 51 days: CON (nonsuspended rats), S + WB (suspended rats for 21 days and then released for regular weight-bearing) and, S + Swim (suspended rats for 21 days and then released from suspension and submitted to swimming exercise). We observed that swimming exercise was effective at fully recovering the bone deterioration caused by suspension, with significant increments in BMD, bone strength and bone volume. On the other hand, regular weight-bearing failed at fully restoring the bone loss induced by unloading. These results indicate that swimming exercise may be a potential tool to improve bone density, strength, and trabecular volume in tibias with bone loss induced by mechanical unloading in suspended rats. We conclude that this modality of activity could be beneficial in improving bone mass, strength, and architecture in osteoporotic individuals induced by disuse, such as bed rest or those exposed to microgravity, who may not be able to perform weight-bearing exercises.

show abstract

Variations in the Bone Status of Contralateral and Regional Sites in Young Athletic Women.

Cited by 37 publications

References 0 publications

Bone Mineral Density in Flatwater Sprint Kayakers

Bone Mineral Density in Flatwater Sprint Kayakers

Effect of physical activity on bone mineral density assessed by limb dominance across the lifespan

The osteogenic effects of swimming on bone mass, strength, and microarchitecture in rats with unloading-induced bone loss

Contact Info

Product

Resources

About