Characterization of the ankle dynamic joint stiffness (quasi-stiffness) as a function of gait speed for overground and treadmill walking

Semi-structured data for ankle moment dynamics in human gait is compiled in “AnkleDynamicsExtractedFromRepos.csv.” This data was preprocessed from the following studies:

• Lencioni T, Carpinella I, Rabuffetti M, Marzegan A, Ferrarin M. Human kinematic, kinetic and EMG data during different walking and stair ascending and descending tasks. Sci Data. 2019 Dec 6;6(1):309. doi: 10.1038/s41597-019-0323-z. PMID: 31811148; PMCID: PMC6897988.

• Fukuchi CA, Fukuchi RK, Duarte M. A public dataset of overground and treadmill walking kinematics and kinetics in healthy individuals. PeerJ. 2018 Apr 24;6:e4640. doi: 10.7717/peerj.4640. PMID: 29707431; PMCID: PMC5922232.

After postprocessing the data, ten metadata parameters are indicated per sample:

ID: A compressed identification with the following syntax: I-SXX-Mode-Gender-Speed
I: Initial from dataset F for Fukuchi et al. and L for Lencioni et al.
SXX: Integer to describe specific subjects.
Mode: T for treadmill, O for overground.
Gender: F for female, M for Male.
Speed: five categories of Speed VS, S, C, F, VF. It may contain numbers as the subject might repeat the same trial.

Example: F-S03-T-M-VS2 Sample from Fukuchi, subject number 3 walking on treadmill, male, velocity speed is very slow and finally, second trial.

Age: Age of the subject
Age-Group: four categories are available—“Children,” “YoungAdults,” “Adults,” and “Elderly.”
Gender: F or M are the unique categories.
Height: float number in cm
Mode: Overground and Treadmill.
Speed: Five categories mentioned in the description.

Following columns are the labels of the postprocessing result:

LoopDirection
initERP: Initialization point in terms of gait cycle percentage for early response phase.
initLRP: Initialization point in terms of gait cycle percentage for late response phase.
initDP: Initialization point in terms of gait cycle percentage for descending phase.
initS: Initialization point in terms of gait cycle percentage for swing phase.
initTS: Initialization point in terms of gait cycle percentage for terminal swing phase.
WorkAbs: Absorbed work in J/kg.
WorkNet: Net work in J/kg.
CP: Linear stiffness in control-plantar flexion. Units (Nm/(kg*rad))
ERP: Linear stiffness in early response phase. Units (Nm/(kg*rad))
LRP: Linear stiffness in large response phase. Units (Nm/(kg*rad))
DP: Linear stiffness in early response phase. Units (Nm/(kg*rad))

踝关节运动动力学在人类步态中的半结构化数据被汇编于“AnkleDynamicsExtractedFromRepos.csv”文件中。该数据集源自以下研究：

• Lencioni T, Carpinella I, Rabuffetti M, Marzegan A, Ferrarin M. 人类在不同行走及楼梯上下过程中的人体运动学、动力学和EMG数据。科学数据，2019年12月6日；6(1):309. doi: 10.1038/s41597-019-0323-z. PMID: 31811148; PMCID: PMC6897988。

• Fukuchi CA, Fukuchi RK, Duarte M. 健康个体在地面上和跑步机上的行走运动学及动力学公共数据集。PeerJ，2018年4月24日；6:e4640. doi: 10.7717/peerj.4640. PMID: 29707431; PMCID: PMC5922232。

数据经过后处理，每个样本包含十个元数据参数：

ID: 一种压缩的标识符，其语法结构为：I-SXX-Mode-Gender-Speed
I: 来自Fukuchi等人的数据集的初始标识为F，来自Lencioni等人的数据集的初始标识为L。
SXX: 描述特定受试者的整数。
Mode: T代表跑步机，O代表地面。
Gender: F代表女性，M代表男性。
Speed: 包括五个速度类别VS、S、C、F、VF。可能包含数字，因为受试者可能重复相同的试验。

示例：F-S03-T-M-VS2 表示来自Fukuchi的研究，受试者编号3在跑步机上行走，男性，速度非常慢，并最终完成第二次试验。

Age: 受试者的年龄
Age-Group: 可用四个类别——“儿童”、“青年”、“成人”和“老年人”。
Gender: 唯一的类别为F或M。
Height: 以厘米为单位的浮点数
Mode: 地面和跑步机。
Speed: 描述中提到的五个类别。

以下列出的列是后处理结果的标签：
LoopDirection
initERP: 早期响应阶段的初始化点，以步态周期百分比为基准。
initLRP: 晚期响应阶段的初始化点，以步态周期百分比为基准。
initDP: 下行阶段的初始化点，以步态周期百分比为基准。
initS: 摆动阶段的初始化点，以步态周期百分比为基准。
initTS: 终末摆动阶段的初始化点，以步态周期百分比为基准。
WorkAbs: 以J/kg为单位的吸收功。
WorkNet: 以J/kg为单位的净功。
CP: 控制足跖屈的线性刚度。单位(Nm/(kg*rad))
ERP: 早期响应阶段的线性刚度。单位(Nm/(kg*rad))
LRP: 大响应阶段的线性刚度。单位(Nm/(kg*rad))
DP: 下行阶段的线性刚度。单位(Nm/(kg*rad))