Articles published in 2021

Badenhorst, J., Pienaar, A.E., Gerber, B. 2021. Effect of the Growth Spurt on Training of Strength and Power During Mid-Adolescence in Boys. The Journal of Strength and Conditioning Research 35(8)/2193–2204. Doi: 10.1519/JSC.0000000000003916.

Bayne, H., Albertus, Y., Breen, S., Green, A., Gustavo de Andrade, A., Kramer, M., Carpes, F.P. 2021. Biomechanics without Borders: Teaching Biomechanics in Brazil and South Africa. Advance Physiology Education – Adv Physiol Educ 45”34 – 36, 2021. Doi:10.1152/advan.00182.2020.

Broodryk, A., Pienaar, C., Edwards, D., Sparks, M. 2021. Effects of a soccer tournament on the psychohormonal states of collegiate female players. Journal of Strength and Conditioning Research, Vol. 35(7)/1873–1884.

Coetzee, D., Du Plessis, W., Van Staden, D. 2021. Longitudinal Effects of Excessive Weight and Obesity on Academic Performance of Primary School Boys in Different Socio-Economic Statuses: The NW-CHILD Study. International Journal of Environmental Research and Public Health 2021, 18, 8891. https://doi.org/10.3390/ijerph18178891.

Denysschen, M., Coetzee, D., Smits-Engelsman, B.C.M. 2021. Children with Poor Motor Skills Have Lower Health-Related Fitness Compared to Typically Developing Children. Children 2021, 8, 867. https://doi.org/10.3390/children8100867.

De Waal, E. and Pienaar, A.E. 2021. Influences of persistent overweight on perceptual-motor proficiency of primary school children: the North-West CHILD longitudinal study. BMC Pediatrics (2021) 21:245, page 2-10. https://doi.org/10.1186/s12887-021-02708-x.

Dicks, N.D., Mahoney, S.J., Kramer, M., Lyman, K.J., Christensen, B.K., Pettitt, R.W., and Hackney, K.J.. 2021. Increased velocity at VO2max and load carriage performance in army ROTC cadets: prescription using the critical velocity concept. Ergonomics 2021, Vol. 64, No. 6, p 733-743. https://doi.org/10.1080/00140139.2020.1858186.

Ellapen, T.J., Paul, Y., Hammill, H.V., Swanepoel, M. 2021. Altered cervical posture kinematics imposed by heavy school backpack loading: A literature synopsis (2009 – 2019). African Journal of Disability 10(0), a687. https://doi.org/10.4102/ajod.v10i0.687.

Frade, S., O’Niel, S., Greene, D., Cameron, C. 2021. Exercise as adjunctive therapy for systematic lupus erythematosus. Cochrane Library, Cochrane Database of Systematic Reviews. https://doi.org/10.1002/14651858.CD014816.

Gerber, B., Pienaar, A.E., Kruger, A. 2021. Influences of differing menarche status on motor capabilities of girls, 13 to 16 years: A two-year follow-up study. International Journal of Environmental Research and Public Health. Int. J. Environ. Res. Public Health 2021, 18. 553, page 2-13. https://doi.org/10.3390/ijerph18115539.

Gerber, B., Pienaar, A.E., Kruger, A. 2021. Differences in muscle power and aerobic endurance in pre- and post-menarche girls during mid-adolescence: A two-year follow-up study.  Journal of Physical Education and Sport ® (JPES), Vol. 21 (2), Art 112, pp. 904 - 914, March 2021 online ISSN: 2247 - 806X; p-ISSN: 2247 – 8051.  DOI:10.7752/jpes.2021.02112

Gerber, B., Pienaar, A.E., Kruger, A. 2021. Two-year follow-up on differences in anthropometric growth between pre-and post-menarcheal girls: implications for sport participation. Journal of Physical Education and Sport (JPES), Vol.21 (Suppl. issue 6), Art 432 pp 3252 – 3264, Nov. 2021 online ISSN: 2247 – 806X; p-ISSN: 2247 – 8051; ISSN – L = 2247 – 8051.

Grace, J., Biggs, C., Naiker, A., Moss, S.J. 2021. Effect of Physical Activity and Nutrition Education on Body Mass Index, Blood Pressure and Biochemical Variables in Overweight and Obse Adoloscents. Annals of Global Health. 2021; 87(1): 1 – 13. Doi:https://doi.org/10.5334/aogh.3147.

Haywood, X., Pienaar, A.E. 2021.  The mediating effect of physical fitness on long term influences of overweight in primary school girls’ academic performance. The Journal of Sports Medicine and Physical Fitness 2021 January; 61(1):63 – 74. Doi:10.23736/S002-4707.20.10192-0.

Haywood, X, Pienaar, A.E. 2021. Long-Term Influences of Stunting, Being Underweight, and Thinness on the Academic Performance of Primary School Girls: The NW-CHILD Study. International Journal of Environmental Research and Public Health. 2021, 18, 8973. https://doi.org/10.3390/ijerph18178973

Kramer, M., Thomas, E.J., Van Aswegen, M. 2021. Functional speed reserve as a proxy for the anaerobic speed reserve using the critical speed concept. Annals of Applied Sport Science 9(2): e928, 2021 – page 1-7. Doi:10.52547/aassjournal.928

Kramer, M., Kholvadia, A. 2021 - The effect of vibration cycle ergometry on pulmonary VO2 kinetics, isokinetic knee torque, and lower extremity explosive power. Ergonomics, Vol.64:7, 943-952, https://doi.org/10.1080/00140139.2020.1862309.

Kruger, R., Kruger, H.S., Monyeki, M.A., Pienaar, A.E., Botha-Le Roux, S., Gafane-Matemane, L.F., Smith, W., Mels, C.M.C., Lammertyn, L., Brits, J.S., Hanssen, H. 2021. A demographic approach to assess elevated blood pressure and obesity in prepubescent children: the ExAMIN Youth South Africa study. Journal of Hypertension 2021, 39:2190 – 2199. DOI:10.1097/HJH.0000000000002917

Kruger, H.S., Ricci, C., Pieters, M., Botha-le Roux, S., Moss, S.J., Kruger, I.M., Van Zyl, T., Schutte, A.E. 2021 - Lifestyle factors associated with the transition from healthy to unhealthy adiposity among black South African adults over 10 years. Nutrition, Metabolism & Cardiovascular Diseases (2021) 31, 2023e2032.https://doi.org/10.1016/j.numecd.2021.03.017

Liu KC, Sheard J, Piatrikova E, Williams S, Parr J, Roe G, and Kramer M. Comparing critical speed modelling approaches and exploring relationships with match-play variables in elite male youth soccer players. SAJSM, 33(1):1-6. Doi:10.17159/2078-516X/2021/v33i1a9738.

Martinasek, M., Tamulevicius, N., Gibson-Young, L., McDaniel, J., Moss, S.J., Pfeffer, I., Lipski, B. 2021. Preditors of Vaping behavior change in Young adults using the Transtheoretical Model: A Multi-Country Study. Tobacco Use Insights, Vol. 14: 1 – 5. sagepub.com/journals-permissons. Doi:10.1177/1179173X20988672.

Moolman, B.W., Van Den Berg, P.H., Broodryk, R. 2021. Performance indicators that discriminate between winning and losing teams in male university rugby sevens teams. International Journal of Performance Analysis in Sport, 21:2, 242 – 249. Doi:10.1080/24748668.2021.1877600.

Musson, C., Kramer, M. 2021. Accelerometery vs. video-derived stroke parameters in high-level swimmers. South African Journal of Sports Medicine 2021; 33: 1 – 6. Doi:10.17159/2078/v33i1a9483.

Pienaar, A.E., Gericke, C, Du Plessis, W. 2021. Competency in object control skills at an early age benefit future movement application: Longitudinal data from the NW-CHILD study. International Journal of Environmental Research and Public Health 2021, 18, 1648. https://doi.org/10.3390/ijerph18041648.

Sedumedi, C.M., Janssen, X., Reilly, J.J., Kruger, H.S., Monyeki, M.A. 2021. Association between Objectively Determined Physical Activity Levels and Body Composition in 6–8-Year-Old Children from a Black South African Population: BC–IT Study. International Journal of Environmental Research and Public Health Int. J. Environ. Res. Public Health 2021, 18, 6453. https://doi.org/10.3390/ijerph18126453.

Strauss, A., Sparks, M., Pienaar, C. 2021. Comparison of the Morphological Characteristics of South African Sub-elite female football players according to playing position. International Journal of Environmental Research and Public Health. Int. J. Environ. Res. Public Health 2021, 18, 3603. Doi:10.3390/ijerph18073603.

Swanepoel, M., Labuschagne, R,. Strydom, G.L., Steyn, H.S., Monyeki, M.A. 2021. The relationship between physical activity status and selected coronary heart disease risk factors amongst employees in a South African financial institution. African Journal for Physical Activity and Health Sciences (AJPHES) Volume 27(2), June 2021, pp. 127-143.

Tinkler, N., Kruger, A., Jooste, J. 2021. Relationship between emotional intelligence and components of competitive state anxiety among South African female field-hockey players.  South African Journal for Research in Sport, Physical Education and Recreation, 2021, 43(3): 87 – 100.

Verbecque, E., Coetzee, D., Ferguson, G., Smits-Engelsman, B. 2021. High BMI and Low Muscular Fitness Predict Low Motor Competence in School-Aged Children Living in Low-Resourced Areas. International Journal of Environmental Research and Public Health - Int. J. Environ. Res. Public Health 2021, 18, 7878. https://doi.org/10.3390/ijerph18157878

Van Der Westhuizen, S.J., Du Toit, D., Van Der Merwe, N., Whipp, P.R. 2021. In-Service training and support programme based on SDT-principles on perceptions of Physical Education. South African Journal for Research in Sport, Physical Education and Recreation, 2021, 43(3): 101 – 114.

Van Niekerk, E., Botha Le Roux, S., Atzler, D., Schwedhelm, E., Boger, R.H., Van Rooyen J.M., Moss, S.J., Mels, C.M. 2021. Blood pressure and nitric oxide synthesis capacity in physical active and inactive groups: the SABPA study. Journal of Human Hypertension (2021) 35, 325-333. https://doi.org/10.1038/s41371-020-0344-2.