DEPORTES DE ALTA INTENSIDAD PROMUEVEN EL DESARROLLO DEL TEJIDO ÓSEO SALUDABLE

Zhonghu Fu Correspondence Zhonghu Fu, Chongqing, China, 401520. fzh282468598@163.com

Physical Education Professional

Competitive Sports Center, Chongqing College of Mobile Communications, Chongqing, 401520, China.

Lijun Gao

Physician

Competitive Sports Center, Chongqing College of Mobile Communications, Chongqing, 401520, China.

AUTHORS’ CONTRIBUTIONS: Each author made significant individual contributions to this manuscript. Zhonghu Fu: writing and performing surgeries; Lijuan Gao: data analysis and performing surgeries, article review, and intellectual concept of the article.

Project	Infrequent exercise group	SD	Regular exercise group	SD	P
Age	10.9	0.7	11	0.8	0.384
Whole-body
Height (cm)	141	7.8	142.5	8.7	0.165
Weight (kg)	37.9	7.8	38.5	6.8	0.65
FM (kg)	10.4	4.9	9.8	3.9	0.437
LM (kg)	26.1	3.9	27.5	3.9	0.078
BMI (kg/ m²)	17.9	2.7	17.7	2.3	0.664
Whole body bones	910	61	929	54	0.087
BMD (g/ cm²)
BMC (mg)	1336	259	1425	265	0.097
BA (cm²)	1414	191	1480	210	0.116
Serum
Le (nmol/ml)	18.7	14.1	19.6	15.1	0.729
E2 (pmol/ml)	109	60	121	71	0.31
IGF-I (ng/ml)	242	98	252	98	0.534

Project	Infrequent exercise group	SD	Regular exercise group	SD	P
Age	11.8	0.7	11.9	0.7	0.441
Whole-body
Height (cm)	146.5	6.8	148.0	7.8	0.262
Weight (kg)	42.5	9.7	43.6	7.8	0.524
FM (kg)	13.8	4.9	13.0	5.8	0.534
BMI (kg/ m²)	18.5	3.1	18.5	2.5	0.391
Whole-body bones
BMD (g/ cm²)	900	76	922	79	0.010
BMC (mg)	1421	364	1636	262	0.039
BA (cm²)	1517	249	1722	266	0.175
Serum
Le (nmol/ml)	17.4	14.3	18.1	15.0	0.510
E2 (pmol/ml)	166	109	176	69	0.553
IGF-I (ng/ml)	325	91	366	94	0.563

Project	Infrequent exercise group	SD	Regular exercise group	SD	P
Age	12.9	0.7	12.9	0.8	0.516
Whole-body
Height (cm)	153	5.8	154	6.8	0.34
Weight (kg)	48.6	9.7	49	7.8	0.805
FM (kg)	13.7	6.8	12.8	4.9	0.417
LM (kg)	33.1	3.9	34.5	3.9	0.019
BMI (kg/ m²)	19.5	3.2	19.4	2.7	0.813
Whole-body bones
BMD (g/ cm²)	995	77	1028	66	0.009
BMC (mg)	1812	331	1916	300	0.01
BA (cm²)	1755	208	1798	192	0.204
E2 (pmol/ml)	160	68	179	93	0.427
IGF-I (ng/ml)	363	71	357	96	0.715

M_{i - 1 i} = [\begin{matrix} c θ_{i} & - s θ_{i} \cdot c a_{i} & s θ_{i} \cdot s a_{i} & l_{i} c θ_{i} \\ s θ_{i} & c θ_{i} \cdot c a_{i} & - c θ_{i} \cdot a_{i} & l_{i} s θ_{i} \\ 0 & s a_{i} & c a_{i} & d_{i} \\ 0 & 0 & 0 & 1 \end{matrix}]

[\begin{matrix} x_{1} \\ y_{1} \\ 0 \\ 1 \end{matrix}] = M_{01}^{- 1} [\begin{matrix} 0 \\ 0 \\ 0 \\ 1 \end{matrix}] = {[\begin{matrix} c θ_{1} & - s θ_{1} & 0 & l_{1} c θ_{1} \\ s θ_{1} & c θ_{1} & 0 & l_{1} s θ_{1} \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{matrix}]}^{- 1} [\begin{matrix} 0 \\ 0 \\ 0 \\ 1 \end{matrix}]

[\begin{matrix} x_{2} \\ y_{2} \\ 0 \\ 1 \end{matrix}] = M_{02}^{- 1} [\begin{matrix} 0 \\ 0 \\ 0 \\ 1 \end{matrix}] = {[\begin{matrix} c θ_{12} & - s θ_{12} & 0 & l_{1} c θ_{1} + l_{2} c θ_{12} \\ s θ_{12} & c θ_{12} & 0 & l_{1} s θ_{1} + l_{2} s θ_{12} \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{matrix}]}^{- 1} [\begin{matrix} 0 \\ 0 \\ 0 \\ 1 \end{matrix}]

[\begin{matrix} x_{3} \\ y_{3} \\ 0 \\ 1 \end{matrix}] = M_{03}^{- 1} [\begin{matrix} 0 \\ 0 \\ 0 \\ 1 \end{matrix}] = {[\begin{matrix} c θ_{123} & - s θ_{123} & 0 & l_{1} c θ_{1} + l_{2} c θ_{12} + l_{3} c θ_{123} \\ s θ_{123} & c θ_{123} & 0 & l_{1} s θ_{1} + l_{2} s θ_{12} + l_{3} s θ_{123} \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{matrix}]}^{- 1} [\begin{matrix} 0 \\ 0 \\ 0 \\ 1 \end{matrix}]

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