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The aim of this study was to investigate whether individualized low-intensity exercise (ILIE) within the recovery domain before lactate threshold 1 (LT 1) improves energetic recovery and general endurance capacity in professional soccer players. Twenty-four professional soccer players (age: 24.53 ± 4.85 years, height: 180 ± 6.30 cm, body mass: 75.86 ± 8.01 kg, body fat: 12.19 ± 2.69%) participated in the study (n = 24). The 1-h ILIE intervention involved 27 jogging sessions spanning nine weeks and jogging speed corresponding to 72% of LT 1 (7.15 ± 0.95 km∙h−1). Pre-ILIE and post-ILIE LT testing variables measured within 9 weeks included blood lactate concentrations (La−) and heart rate (HR) at specific exercise intensities during ILIE LT test. The jogging/running speeds (S), delta (Δ) S, HR, and ΔHR were measured at 1.5, 2.0, 3.0, and 4.0 mmol∙L−1 La−, respectively. Values of La− and HR at the same exercise intensities (5.4–16.2 km∙h−1) in the post-ILIE LT test compared with pre-ILIE LT test were significantly decreased (P < 0.05 and P < 0.01, respectively). Furthermore, S at all specific La− levels (1.5, 2.0, 3.0, and 4.0) were significantly increased, while HR at 2.0, 3.0, and 4.0 La− decreased significantly (P < 0.05 and P < 0.01, respectively). Low to moderate positive correlations were observed between ΔS and ΔHR at 1.5 and 2.0 La− (r = 0.52 and r = 0.40, respectively). The nine-week ILIE improved energy recovery and general endurance of professional soccer players. This relates to repeated high-intensity intermittent sprints during the 90-min soccer game.

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In the case of evaporation crystallization, the density of -hexanitrohexaazaisowurtzitane ( -HNIW, C 6 H 6 N 12 O 12 ) crystals was controlled using the evaporation rate, initial HNIW concentration, and temperature as the operating parameters. When crystal growth was promoted, the crystal density was found to deviate from the theoretical density, probably due to the inclusion of voids in the crystals that amplified the decrease in the crystal density. Thus, the crystal density was significantly reduced when the evaporation rate and initial HNIW concentration were increased. The influence of the evaporation rate on the crystal density was also found to be much stronger than that of the initial HNIW concentration. However, the crystal density was enhanced when the temperature was increased, due to a retardation of the crystal growth process. It was also interesting to find that the β-form of HNIW crystals was obtained with a high evaporation rate above 0.125 mL/h at 70 °C.

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