Search Results - Jeffreys, I.

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  1. 1

    The effect of the menstrual cycle phases on back squat performance, jumping ability and psychological state in women according to their level of performance -A randomized three-arm...

    Isenmann, E., Held, S., Geisler, S., Flenker, U., Jeffreys, I., Zinner, C. “…Jeffreys, I.…”
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  2. 2

    Mixed training programs applied to young soccer players: Effects on speed-power abilities

    Freitas, T. T., Pereira, L. A., Alcaraz, P. A., Azevedo, P. H. S. M., Zanetti, V., Pantarotto, N. B., Reis, V. P., Jeffreys, I., Loturco, I. “…Jeffreys, I.…”
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  3. 3

    Using artificial neural networks to help in the process of sports selection and orientation through morphological and biodynamic parameters: a pilot study

    de Almeida-Neto, P. F., Barboza Neto, R., Gama de Matos, D., Azevedo de Medeiros, J., Bulhões-Correia, A., Jeffreys, I., Lobato, C. H., Aidar, F. J., Moreira Silva Dantas, M., Araújo Tinôco Cabral, B. G.
    Published in Sport Sciences for Health (2023)
    “…Jeffreys, I.…”
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  4. 4

    Interrelationships between multiple speed tests in youth soccer: are players equally efficient at performing different sprint and change of direction tasks?

    Freitas, T.T., Pereira, L. A., Alcaraz, P. E., Cadore, E. L., Grazioli, R., Azevedo, P. H. S. M., Jeffreys, I., Loturco, I. “…Jeffreys, I.…”
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  5. 5

    Muscle strength of the upper limbs & biological maturation: associations with bone mass in adolescent athletes of both sexes

    De Almeida-Neto, P. F., de Matos, D. G., Jeffreys, I., de Queiros, V. S., Aidar, F. J., Monteiro Pinto, V. C., Bulhões-Correia, A., Silva Dantas, P. M., Cabral, B. G. A. T.
    Published in Sport Sciences for Health (2022)
    “…Jeffreys, I.…”
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  6. 6

    Biological age, testosterone, and estradiol as discriminating factors of muscle strength levels in young athletes

    De Almeida-Neto, P. F., Gama de Matos, D., Monteiro Pinto, V. C., Monteiro Monte Oliveira, V., da Silva Cunha de Medeiros, R. C., Jeffreys, I., Moreira Silva Dantas, P., Aidar, F. J., de Araújo Tinoco Cabral, B. G. “…Jeffreys, I.…”
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  7. 7

    Multidirectional sprints in soccer: are there connections between linear, curved, and change-of-direction speed performances?

    Freitas, T. T., Jeffreys, I., Reis, V. P., Fernandes, V., Alcaraz, P. E., Pereira, L. A., Loturco, I. “…Jeffreys, I.…”
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  8. 8

    Equation for analyzing the peak power in aquatic environment: An alternative for olympic rowing athletes

    de Almeida-Neto, P. F., da Silva, L. F., Gama de Matos, D., Jeffreys, I., de Macedo Cesário, T., Barboza Neto, R., de Almeida Barbosa, W., Aidar, F. J., Moreira Silva Dantas, P., Guilherme de Araújo Tinoco Cabral, B.
    Published in PLOS ONE (2021)
    “…Jeffreys, I.…”
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  9. 9

    Short-term detraining does not impair strength, speed, and power performance in elite young soccer players

    Pereira, L. A., Freitas, T. T., Pivetti, B., Alcaraz, P. E., Jeffreys, I., Loturco, I.
    Published in Sports (2020)
    “…Jeffreys, I.…”
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  10. 10

    Change-of-direction, speed and jump performance in soccer players: a comparison across different age-categories

    Loturco, I., Jeffreys, I., Abad, C. C. C., Kobal, R., Zanetti, V., Pereira, L. A., Nimphius, S.
    Published in Journal of Sports Sciences (2020)
    “…Jeffreys, I.…”
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  11. 11

    Resisted sprint velocity in female soccer players: Influence of physical capacities

    Loturco, I., Jeffreys, I., Kobal, R., Reis, V. P., Fernandes, V., Rossetti, M., Pereira, L. A., McGuigan, M. “…Jeffreys, I.…”
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  12. 12

    Vertical force production in soccer: Mechanical aspects and applied training strategies.

    Loturco, I., Bishop, C., Freitas, T. T., Pereira, L. A., Jeffreys, I.
    Published in Strength and Conditioning Journal (2020)
    “…Jeffreys, I.…”
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  13. 13

    Acceleration and speed performance of Brazilian elite soccer players of different age-categories

    Loturco, I., Jeffreys, I., Kobal, R., Cal Abad, C. C., Ramirez-Campillo, R., Zanetti, V., Pereira, L. A., Nakamura, F. Y.
    Published in Journal of Human Kinetics (2018)
    “…Jeffreys, I.…”
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  14. 14

    Rethinking long-term athlete development - A behavioral approach.

    Jeffreys, I.
    Published in Strength and Conditioning Journal (2019)
    “…Jeffreys, I.…”
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  15. 15

    The warm-up: A behavioral solution to the challenge of initiating a long-term athlete development program.

    Jeffreys, I.
    Published in Strength and Conditioning Journal (2019)
    “…Jeffreys, I.…”
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  16. 16

    Maximum acceleration performance of professional soccer players in linear sprints: Is there a direct connection with change-of-direction ability?

    Loturco, I., Pereira, L. A., Freitas, T. T., Alcaraz, P. E., Zanetti, V., Bishop, C., Jeffreys, I.
    Published in PLOS ONE (2019)
    “…Jeffreys, I.…”
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  17. 17

    Delivering a gamespeed-focused speed and agility development program in an English Premier League Soccer Academy.

    Jeffreys, I., Huggins, S., Davies, N.
    Published in Strength and Conditioning Journal (2018)
    “…Jeffreys, I.…”
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  18. 18

    The current use of GPS, its potential, and limitations in soccer

    Hennessy, L., Jeffreys, I.
    Published in Strength and Conditioning Journal (2018)
    “…Jeffreys, I.…”
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  19. 19

    Change-of direction deficit in elite young soccer players

    Loturco, I., Nimphius, S., Kobal, R., Bottino, A., Zanetti, V., Pereira, L. A., Jeffreys, I. “…Jeffreys, I.…”
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  20. 20

    The effects of anthropometry and leg muscle power on drive and transition phase of acceleration: a longitudinal study on young soccer players

    Nikolaidis, P. T., Ingebrigtsen, J., Jeffreys, I. “…Jeffreys, I.…”
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