Publications by authors named "Iida Laatikainen-Raussi"
Alterations in skeletal muscle morphology and composition are critical factors in cerebral palsy (CP), including changes in passive stiffness and in belly and fascicle lengths. In this study, we quantified the relative contributions of muscle and tendon to passive stiffness across the ankle range of motion in individuals with CP and typically developing (TD) peers. We also investigated morphological factors underlying increased muscle stiffness.
View Article and Find Full Text PDFThis study aimed to develop and validate a load cell-based device for measuring isometric forearm rotation torque and to determine its test-retest reliability.The custom-built device was calibrated using known weights and validated against a high-precision torque transducer. For reliability assessment, 35 physically active participants (20 males, 15 females; age 30 ± 7 years) were tested for isometric forearm pronation and supination strength 5-7 d apart.
View Article and Find Full Text PDFIndividuals with cerebral palsy (CP) are suggested to be less active than typically developing controls (TDs). However, their higher physical activity (PA) energy expenditure during a given activity should be considered. We investigated PA in 10 children and young adults with CP (seven males, 15.
View Article and Find Full Text PDFPurpose: Substrate metabolism during exercise may vary across the menstrual cycle (MC) phases, likely due to estradiol (E2) and progesterone (P4). This study examined substrate metabolism during exercise in naturally menstruating (NoOC, n = 34) and women using combined oral contraceptives (COC, n = 19).
Methods: Participants were measured in a fasted state in the follicular (FOL) and luteal (LUT) phases, or the inactive (INACT) and active (ACT) phases of COC use.
Article Synopsis
- Recent research indicates that the ability to maintain physiological characteristics might play a key role in endurance performance, leading to a study on the effects of low-intensity exercise on lactate threshold and sex differences in fatigue.
- In the study, 31 recreational runners (15 females) underwent treadmill testing and a 90-minute low-intensity exercise session, with measurements taken for lactate thresholds, heart rate, and other physiological parameters.
- The results showed significant decreases in lactate threshold for both sexes during the exercise, with a notable correlation found between changes in heart rate variability (DFA-a1) and lactate threshold, suggesting DFA-a1 might serve as an indicator of endurance capacity.
Background: Enhancing traditional three-dimensional gait analysis with a portable ultrasound device at the lower-limb muscle-tendon level enables direct measurement of muscle and tendon lengths during walking. However, it is important to consider that the size of the ultrasound probe and its attachment on the lower limb may potentially influence gait pattern.
Research Question: What is the effect of wearing an ultrasound probe at the lower limb in adolescents with cerebral palsy and typically developing peers?
Methods: Eleven individuals with cerebral palsy and nine age-matched typically developing peers walking barefoot at their self-selected speed were analyzed.
Purpose: The aim of this study was to investigate internal Achilles tendon (AT) displacement, AT shear wave velocity (SWV), and triceps surae (TS) muscle shear modulus in athletes.
Methods: Internal AT displacement was assessed using ultrasound during isometric contraction. Shear wave elastography was used to assess AT SWV (m × s) at rest and TS muscle shear modulus (kPa) during passive ankle dorsiflexion.