Make Samozino Profile

Source: R/samozino.R

make_samozino_profile generates Samozino profile from squat jump data. When both aerial_time and height are forwarded to the function, only height is used to estimate mean GRF.

make_samozino_profile(
  bodyweight,
  push_off_distance,
  external_load,
  height,
  aerial_time,
  gravity_const = 9.81,
  plot = TRUE
)

Arguments

bodyweight

Numeric value
push_off_distance

Numeric value
external_load

Numeric vector
height

Numeric vector
aerial_time

Numeric vector
gravity_const

Numeric vector. Default 9.81
plot

TRUE/FALSE. Default is TRUE

Value

List of Samozino profile parameters

References

Samozino, Pierre. ‘A Simple Method for Measuring Lower Limb Force, Velocity and Power Capabilities During Jumping’. In Biomechanics of Training and Testing, edited by Jean-Benoit Morin and Pierre Samozino, 65–96. Cham: Springer International Publishing, 2018. https://doi.org/10.1007/978-3-319-05633-3_4.

———. ‘Optimal Force-Velocity Profile in Ballistic Push-off: Measurement and Relationship with Performance’. In Biomechanics of Training and Testing, edited by Jean-Benoit Morin and Pierre Samozino, 97–119. Cham: Springer International Publishing, 2018. https://doi.org/10.1007/978-3-319-05633-3_5.

Samozino, Pierre, Jean-Benoît Morin, Frédérique Hintzy, and Alain Belli. ‘Jumping Ability: A Theoretical Integrative Approach’. Journal of Theoretical Biology 264, no. 1 (May 2010): 11–18. https://doi.org/10.1016/j.jtbi.2010.01.021.

Samozino, Pierre, Enrico Rejc, Pietro Enrico Di Prampero, Alain Belli, and Jean-Benoît Morin. ‘Optimal Force–Velocity Profile in Ballistic Movements—Altius’: Medicine & Science in Sports & Exercise 44, no. 2 (February 2012): 313–22. https://doi.org/10.1249/MSS.0b013e31822d757a.

Examples

require(tidyverse)

data("testing_data")

with(
  filter(testing_data, athlete == "Jack"),
  make_samozino_profile(
    bodyweight = bodyweight,
    push_off_distance = push_off_distance,
    external_load = external_load,
    aerial_time = aerial_time,
    plot = TRUE
  )
)
#> $F0
#> [1] 2235.995
#> 
#> $F0_rel
#> [1] 26.30583
#> 
#> $V0
#> [1] 4.037337
#> 
#> $Pmax
#> [1] 2256.867
#> 
#> $Pmax_rel
#> [1] 26.55137
#> 
#> $Sfv
#> [1] -553.8293
#> 
#> $Sfv_rel
#> [1] -6.515638
#> 
#> $take_off_velocity
#> [1] 2.444065
#> 
#> $height
#> [1] 0.3044574
#> 
#> $optimal_F0
#> [1] 3389.95
#> 
#> $optimal_F0_rel
#> [1] 39.88176
#> 
#> $optimal_V0
#> [1] 2.663009
#> 
#> $optimal_height
#> [1] 0.3614484
#> 
#> $optimal_height_diff
#> [1] 0.05699097
#> 
#> $optimal_height_ratio
#> [1] 1.187189
#> 
#> $optimal_Pmax
#> [1] 2256.867
#> 
#> $optimal_Pmax_rel
#> [1] 26.55137
#> 
#> $optimal_take_off_velocity
#> [1] 2.663009
#> 
#> $optimal_take_off_velocity_diff
#> [1] 0.2189439
#> 
#> $optimal_take_off_velocity_ratio
#> [1] 1.089582
#> 
#> $optimal_Sfv
#> [1] -1272.977
#> 
#> $optimal_Sfv_rel
#> [1] -14.9762
#> 
#> $Sfv_perc
#> [1] 43.50661
#> 
#> $FV_imbalance
#> [1] 56.49339
#> 
#> $probe_IMB
#> [1] 42.45125
#> 
#> $RSE
#> [1] 0.1172931
#> 
#> $R_squared
#> [1] 0.8280585
#>