These are the things that keep me awake at night

state1.js

this.state = ['time', 'distance', 'pace'].reduce((obj, el) => {
      obj[el] = { value: values[el], enabled: type !== el };
      return obj;
    }, {});

state2.js

this.state = {
      time: {
        value: values.time,
        enabled: type !== 'time'
      },
      distance: {
        value: values.distance,
        enabled: type !== 'distance',
      },
      pace: {
        value: values.pace,
        enabled: type !== 'pace',
      },
    };