The Effect of Real-Time Feedback Regarding the Center-of-Pressure Position on Patellofemoral Joint Loading During Double-leg Squatting.

Background: Exercise therapy is the cornerstone of patellofemoral (PF) pain management. However, whether squat exercises are therapeutic or detrimental depends on their technique and the resulting load on the PF joint.

Purpose/hypothesis: The purpose of this study was to investigate whether real-time feedback to position the center-of-pressure (COP) anteriorly could reduce the PF joint reaction force and stress during bodyweight double-leg squatting.

Molecular Basis of Absorption at 340 nm of 3-Ketoglucosides under Alkaline Conditions.

Transient absorption at 340 nm under alkaline conditions has long been used to detect the presence of 3-keto--glycosides without understanding the molecular basis of the absorbance. The time course of for the alkaline treatment of 3-ketolevoglucosan, an intramolecular 3-keto--glycoside, was investigated to identify the three products generated through alkaline treatment. By comparing the spectra of these compounds under neutral and alkaline conditions, we identified 1,5-anhydro-D--hex-1-en-3-ulose (2-hydroxy-3-keto-D-glucal) as being the compound responsible for the absorption.

Estimation of Vertical Ground Reaction Force during Single-leg Landing Using Two-dimensional Video Images and Pose Estimation Artificial Intelligence.

Objective: Assessment of the vertical ground reaction force (VGRF) during landing tasks is crucial for physical therapy in sports. The purpose of this study was to determine whether the VGRF during a single-leg landing can be estimated from a two-dimensional (2D) video image and pose estimation artificial intelligence (AI).

Methods: Eighteen healthy male participants (age: 23.